Ruike P851-B Knife

RUIKE Outdoor Tools Manufacturing Co., Ltd. is a Chinese knife manufacturer founded in 1998 by master knife maker Mr. Leung, and DuloTech EOOD is the brand’s official representative and importer for Bulgaria. Before launching its own brand in 2016, the company spent nearly two decades manufacturing knives for other well-known brands—experience that is evident today in the precision of every model in the catalog.

About RUIKE

RUIKE was founded in 1998 in China and began as a contract manufacturer for other knife brands before launching its own brand in 2016. Today, the catalog includes three main lines—folding knives, fixed-blade knives, and multi-purpose knives.The brand is known for patented technologies such as the “Beta Plus” and “Thumb Up” safety systems, cryogenic steel hardening, and ball bearings for smooth opening. The brand has an international community of ambassadors—mountain guides, survival instructors, and reviewers on YouTube and Instagram around the world. In Bulgaria, RUIKE is officially imported by DuloTech, which guarantees an authentic product and a valid warranty.

Contents

• How the RUIKE Story Began
• The “For the Person of Action” Philosophy
• The Technologies That Set RUIKE Apart
• The Product Line—Three Categories of Knives
• Sample Models by Intended Use
• Ambassadors, Reviewers, and Marketing Campaigns Around the World
• Warranty and After-Sales Service
• RUIKE and DuloTech—the official representative in Bulgaria
• Frequently Asked Questions (FAQ)
• Related Resources

1. RUIKE—The Brand’s History

RUIKE Outdoor Tools Manufacturing Co., Ltd. was founded in 1998 by Mr. Liung, a knife maker with many years of experience in the design and manufacture of blades. The company is located in Shenzhen, China, in the Xinghong Technology Park. For nearly 20 years, RUIKE has served as a manufacturing base for numerous Chinese and international knife brands, building expertise in metalworking and the engineering design of locks and mechanisms.In 2016, the company decided it had sufficient experience and confidence to launch its own brand, named after the company itself—RUIKE (pronounced “rake”). Since then, the brand has been developing three product lines in parallel: folding knives, fixed-blade knives, and multifunctional tools, all manufactured at the factory in Shenzhen.Since 2016, the brand’s exclusive representative has been Fenixlight Limited—the company behind the well-known Fenix flashlights. This partnership is no coincidence: RUIKE applies the same approach to quality and reliability that Fenix applies to its lighting equipment, and both brands share a common distribution network in many countries, including Bulgaria through dulotec.com.

2. “For the Person of Action”

RUIKE’s motto—“For the Person of Action”—summarizes the brand’s entire approach: knives made for people who will use them actively. The brand strives to offer high-quality, reliable, and practical tools tailored to users’ real-world experiences—from everyday carry (EDC) in the city to harsh conditions in the mountains or during emergencies.This philosophy explains why the catalog is divided into clear functional categories rather than simply by aesthetics: each series is designed with a specific use in mind, not just as another model for a collection.

3. The Technologies That Set RUIKE Apart

RUIKE invests in several patented or specialized technologies that are featured across much of the catalog and essentially define the brand’s sense of quality.

• Cryogenic Treatment: All RUIKE blades undergo cryogenic heat treatment, which eliminates residual stresses in the steel and improves hardness (HRC), wear resistance, and corrosion resistance.
• Bearing Washers: RUIKE uses two types of bearings—ball (Thrust Ball Bearing Washer) and roller (Thrust Roller Bearing Washer), made from specialized high-carbon chromium bearing steel, for smooth and quick blade deployment.
• "Beta Plus" Safety Lock: a patented safety system that prevents accidental blade closure and excessive lockbar overtravel.
• "Thumb Up" Safety Lock: Mounted at the rear of the handle, this lock allows for quick engagement and disengagement with the thumb, providing additional protection against accidental closure.
• Lightweight Construction: The internal steel liner is milled to reduce weight without compromising strength.
• Compatibility with a lanyard and a rotary belt buckle: for comfortable carrying and angle adjustment on fixed-blade knives.

4. Product Line—Three Categories of Knives

The 2026 RUIKE catalog is divided into three main categories: Folding Knives, Fixed Blade Knives, and Multi-Functional Knives.

Category	Series	Features
Folding Knives	P Series, M Series (TZ), D Series	The widest range—from compact EDC models to tactical flippers with titanium handles
Fixed-blade knives	F Series	Full-tang construction, ABS plastic sheaths with a rotating belt clip
Multifunctional knives (Criterion Collection)	S, M, L, LD Series	Classic "Swiss Army" style with multiple tools—from small keyring models to the LD series with a blade lock

In addition to the three main categories, the catalog also includes a specialized Rescue Knife line (model LD43)—a multi-tool designed specifically for rescue and emergency situations, featuring a belt-cutting tool, a glass breaker, and a belt clip.

5. Models by Intended Use

The RUIKE catalog offers models for practically any situation—from pocket carry in the city to heavy-duty outdoor work. Here are a few examples by intended use and construction type:

• EDC / everyday carry in the city: the P865-B (71 g, 14C28N blade, G10 handle) and P882-B/P882-G (back lock, 71.8 g) are lightweight and compact pocket folding knives. The multifunctional S series (S11, S21, S22, S31) features a blade, scissors, a can opener, and a small screwdriver, all weighing under 55 g—ideal for a keychain.
• Tactical / Self-Defense: The P881-B1/P881-W (karambit) models and the fixed-blade F815-B/F815-J and FS68 (fixed karambit) are designed for self-defense and specialized tactical use.
• Outdoor / Hiking and Camping: The fixed-blade knives from the F series—the F118-B/G with a full tang and 14C28N steel, as well as the more robust F181 and F186 models with ABS scales and a rotating buckle—are built for heavy-duty field use. The multifunctional L and LD series (e.g., LD41, LD42, L51) combine a saw, drill bit, wire cutter, and camping tools into a single unit.
• Hunting and bushcraft applications: the D-series models (D191-B/G/W, D712-G) and the more compact P-series flippers (P108, P121, P127, P128) combine 14C28N or 8Cr13MoV steel with ergonomic G10 handles, suitable for precision work in the field.
• Premium / Collector’s Models: the titanium M Series (TZ) — M108-TZ, M121-TZ, M661-TZ, M671-TZ, M875-TZ—uses steels such as 154CM, S35VN, and N690Co with TC4 titanium handles, combining lightness with exceptional strength.

Important Information About the Steels in the Catalog

Most of the current RUIKE catalog features Sandvik 14C28N—a Swedish stainless steel offering a good balance of sharpness, corrosion resistance, and ease of sharpening. The more affordable models (D191, D198, D712) use 8Cr13MoV, while the premium series use 154CM, S35VN, N690Co, or D2, depending on the specific model.

6. Ambassadors, Reviewers, and Marketing Campaigns Around the World

RUIKE is building its international reputation through partnerships with mountain guides, survival instructors, and independent reviewers on YouTube and Instagram, rather than through traditional television advertising. In its official catalog, the brand features several such ambassadors and their impressions of the products. Among the featured ambassadors is Pedro Hidalgo — founder and CEO of Survival Training Experience (GLOBALTRAINER) and leader of the TAD 0-13/TACFIT team, who shares his experience in teaching people how to stay safe in the mountains with a minimal set of EDC tools. Another brand ambassador is Bautista Bermudez—a Spanish mountaineer, adventurer, and sports coach who has climbed some of the most iconic peaks in Spain, Portugal, and the Atlas Mountains in Morocco. The brand also maintains active official social media channels—Instagram (@ruike_knives) and Facebook (@ruikeknives) — where it periodically posts photos from the field, new models, and collaborations with photographers from the open-carry and bushcraft communities around the world.

7. Warranty and After-Sales Service

RUIKE offers a structured warranty policy applicable to officially imported products:

• 15-day replacement option for defective items
• 5 years of free repairs
• Lifetime product support, accompanied by a warranty certificate.

This policy applies to genuine products purchased through the official distribution network—as is the case with products imported by DuloTech EOOD for Bulgaria.

8. RUIKE and DuloTech—the Official Representative in Bulgaria

Dulotec EOOD is the official representative, importer, and distributor of the RUIKE brand for Bulgaria, which means genuine products, a valid international warranty, and localized customer support. By purchasing a RUIKE knife through Dulotec.com, customers avoid the risk of parallel imports or replicas and gain access to the brand’s full catalog—folding, fixed, and multifunctional models—with consultation in Bulgarian.

Practical Recommendations

• For everyday urban carry, choose a lightweight folding knife weighing less than 100 g and made of 14C28N steel—easy to maintain and sufficiently corrosion-resistant.
• For mountaineering and bushcraft, opt for a fixed-blade knife with a full-tang construction from the F series—more durable than a folding model under heavy use.
• If you’re looking for an “all-in-one” tool for emergencies, check out the LD series or the specialized Rescue Knife (LD43) with a blade lock and a buckle.
• Check which technology icons (Beta Plus, Thumb Up, bearing washers) are featured on the specific model—they are not available on all knives in the catalog.
• Purchase only through an official importer to take full advantage of the 5-year warranty for free repairs.

If you’re looking for a specific Ruike model for everyday carry, hunting, or hiking, check out the full Ruike lineup at Dulotec.com, where the brand is featured alongside other brands such as Fox Knives, Manly, Linder, and our own Dulotec K-series line. For additional blade maintenance, check out the available sharpening tools from Work Sharp and AccuSharp, and for a complete outdoor kit—visit the Tactical Gear and Survival sections.

RUIKE - Series Overview

Series	Type	Example Models	Suitable for
P Series	Foldable	P105, P108, P121, P127, P128, P661, P801, P831S, P841, P851, P865, P873, P875, P878, P881, P882	EDC, tactical use, collectible
M Series (TZ)	Folding, titanium	M108-TZ, M121-TZ, M126-TZ, M661-TZ, M662-TZ, M671-TZ, M875-TZ	Premium EDC, Collectors
D Series	Folding, flipper	D191-B/G/W, D198-PB/PB2, D712-G	Everyday carry, budget class
F Series	Fixed	F118-B/G, F181-W/B/B1, F186-MB/MG/MN, F815-B/J, FS68	Bushcraft, hunting, survival
S / M / L / LD Series	Multifunctional	S11-S31, M11-M61, L11-L51, LD11-LD51, LD43 (Rescue)	Camping, emergencies, keychain

Frequently Asked Questions

Who manufactures RUIKE knives?

RUIKE Outdoor Tools Manufacturing Co., Ltd. is a Chinese manufacturer founded in 1998 in Shenzhen by knife maker Mr. Liung. The company has been producing its own RUIKE brand since 2016, following nearly 20 years of experience as a manufacturer for other brands.

Which country is the RUIKE brand from?

RUIKE is a Chinese brand, with its headquarters and manufacturing facility in Shenzhen, China. The products are distributed internationally through partners such as Fenixlight Limited and, for Bulgaria, through DuloTech EOOD.

Who is the official representative of RUIKE in Bulgaria?

Dulotek EOOD is the official representative and importer of the RUIKE brand for the Bulgarian market, offering the full catalog of folding, fixed, and multifunctional knives with a valid warranty.

What types of knives does RUIKE manufacture?

The RUIKE catalog is divided into three main categories: folding knives (P, M, D series), fixed-blade knives (F series), and multifunctional knives (S, M, L, LD series), including a specialized Rescue Knife model.

What type of steel are RUIKE knives made of?

Most of the catalog uses Swedish Sandvik 14C28N steel. The more affordable models use 8Cr13MoV, while the premium models use 154CM, S35VN, N690Co, or D2, depending on the specific model.

What is the “Beta Plus” Safety Lock?

It is a patented RUIKE safety system that prevents the blade from accidentally closing and excessive “travel” of the lockbar mechanism on folding knives.

What is the “Thumb Up” Safety Lock?

""Thumb Up" is another patented RUIKE lock located at the rear of the handle, which allows for quick engagement/disengagement with an upward or downward thumb movement and prevents the blade from closing unintentionally.

Why are RUIKE knives cryogenically treated?

Cryogenic treatment removes residual stresses in the steel and improves the blade’s hardness (HRC), wear resistance, and corrosion resistance—a process that RUIKE applies to all of its blades.

Who is the founder of RUIKE?

The brand was founded by Mr. Leung—a knife maker with many years of experience in blade design and manufacturing—who established the company in 1998.

What is the difference between RUIKE’s P Series and D Series?

The P Series is RUIKE’s widest range of folding knives—it includes models for EDC, tactical, and collector’s use, featuring a variety of materials (G10, Micarta, titanium, carbon fiber). The D Series is a more affordable alternative featuring a flipper mechanism, typically made from 8Cr13MoV steel.

What is RUIKE’s M Series (TZ)?

The M Series (TZ) is a premium line of folding knives with TC4 titanium handles and premium steels such as 154CM, S35VN, and N690Co—designed for collectors and users seeking maximum lightness and durability.

Which RUIKE models are suitable for everyday carry (EDC)?

Compact models such as the P865-B, P882-B/G, D712-G, and the S series of multifunctional knives (S11, S21, S22, S31) are lightweight, small, and suitable for carrying in a pocket or on a keychain.

Which RUIKE models are suitable for hiking and bushcraft?

The fixed-blade knives from the F series (F118, F181, F186) and the L/LD series multifunctional knives (L51, LD41, LD42) are designed with a focus on durability and additional field tools.

Are there any RUIKE knives for hunting?

Yes, the D-series models and some of the P-series models with a fixed blade or a solid flipper design, made from 14C28N or 8Cr13MoV steel, are suitable for hunting and field work with game.

What are RUIKE’s multifunctional knives?

This is the Criterion Collection—the S, M, L, and LD series—featuring a classic “Swiss Army” design with a combination of a blade, scissors, screwdrivers, a drill bit, a saw, wire cutter, and other tools, in various sizes depending on the series.

What is RUIKE’s LD series?

The LD series is RUIKE’s largest and most functional line of multi-tool knives, featuring one-handed opening and a locking blade (unlike the S, M, and L series), including the specialized Rescue Knife model LD43.

What warranty does RUIKE offer?

RUIKE offers a 15-day replacement policy for defective items, 5 years of free repairs, and lifetime maintenance, accompanied by a warranty certificate—valid for genuine products purchased through an official representative.

Who are RUIKE’s brand ambassadors?

Among the brand’s publicly named ambassadors are Pedro Hidalgo—founder of Survival Training Experience (GLOBALTRAINER)—and Bautista Bermúdez—a Spanish mountaineer and sports coach. Both share their practical experience with RUIKE knives in mountaineering and survival situations.

How does RUIKE promote its products on social media?

The brand primarily collaborates with independent YouTube and Instagram channels dedicated to knives and EDC gear, publishes reviews and testimonials from real users, and maintains official profiles on Instagram (@ruike_knives) and Facebook (@ruikeknives).

Can I buy RUIKE knives directly from China?

Technically, yes, but such imports carry the risk of counterfeits, lack of warranty coverage, and additional customs duties/fees. Purchasing through an official representative like DuloTech guarantees an authentic product and a valid warranty on the Bulgarian market.

What does “RUIKE” mean, and how is it pronounced?

According to the manufacturer’s official information, the name is pronounced roughly like “reik” (/reik/)—RUIKE is a standalone name chosen by the company when it launched its own brand in 2016.

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