BM Balisong Butterfly Folding Knife 3.74" 440C Plain Blade, Blue Hole Stainless steel Handles - BM42
BM: Blue BM42 Balisong Butterfly
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Overall Length: 240 mm (9.44 inches)
Blade length: 95 mm (3.74 inches)
Blade thickness: 3.0 mm
Handle material: Stainless steel
Hardness: 58-60 HRC
Blade material: 440C
Packing: boxed
Net weight: 150 grams
Blade Angle:60°
Premium Blade Material & Geometry
The BM Balisong Butterfly Folding Knife features a 3.74″ blade made from 440C stainless steel—a well-regarded high-carbon stainless alloy offering a very good balance of wear resistance, corrosion resistance and toughness. The plain-edge configuration allows smooth, precise slicing and lends itself well to maintenance and sharpening. At 3.74″, the blade gives meaningful cutting length while still fitting within flipping/balisong carry and performance constraints. For balisong models, blade steel and design matter: the 440C blade provides a dependable cutting edge, rigid build and user confidence, whether flipping for sport, display or practical use.
• Blue-Hole Stainless Steel Handles & Mechanical Structure
The handle set is constructed from stainless steel and finished in a “blue-hole” style (holes in the handle scales for weight reduction, aesthetics and grip texture). Stainless steel handles contribute considerable structural strength and durability, ensuring the flipping mechanism has robust support and long lifespan. The blue-hole pattern not only gives visual appeal but reduces weight, aids balance and provides “bite” in the hand for enhanced control during manipulation. The hinge system, pins, bushings and latch mechanism are engineered with performance in mind so the bushing/washer interfaces are smooth, deployment is consistent, and the latch retains securely when closed or open. For a user who values flipping feel, mechanics and build quality, this handle design and material package deliver.
• Balisong Format with Tactical and Practical Utility
Though many balisongs are carried for trick flipping or display, the BM Balisong Butterfly Folding Knife is built with serious materials and construction, meaning it transitions well into real-world utility. The 440C blade and stainless handles ensure robustness; the size and carry format keep it manageable. Whether used for everyday cutting tasks, gear prepping, leisure flipping or as part of a collection, this tool bridges the gap between performance and style. The balisong format also offers fast deployment and a distinctive use experience for users who appreciate the mechanics of flipping knives. The design ensures that when the blade is needed for more than show, it delivers.

Product Advantages
• High-Quality 440C Stainless Steel Blade for Cutting Performance
By selecting 440C stainless steel for the 3.74″ blade, this knife offers a blade material known for its excellent balance between corrosion resistance and wear resistance—commonly found in higher-end production knives. The plain edge ensures smooth slicing and simpler maintenance. For Balisong users who demand more than novelty, this blade material brings performance and longevity.
• Robust Stainless Steel Handles with Blue-Hole Weight Reduction & Design
Stainless steel handle construction gives durability and structural stability to the flipping action, while the blue-hole design reduces overall weight and improves balance, making manipulation smoother and more controlled. The handle design, hardware and finish all reflect premium construction. This results in a flipping feel that is responsive, smooth and built for repeated use rather than occasional handling.
• Mechanically Engineered for Smooth Balisong Action & Secure Use
Beyond material choice, the BM Balisong Butterfly Folding Knife emphasizes mechanical quality: hinge bushings/rollers, precise pivot fit-ment, tight tolerances and secure latch system. These contribute to consistent opening/closing, minimal play and reliable lock-up (when open) or secured carry (when closed). For enthusiasts or regular users, this mechanical performance matters as much as materials.
• Balanced Size for Utility and Carryability
At 3.74″ blade length, the knife is large enough to provide real cutting ability yet small enough to carry reasonably and flip comfortably. The handle size, weight due to material choice and overall profile are optimized for manipulation, flipping performance and utility. This means the tool does not feel like a lightweight display piece but a usable folding knife.
• Versatility for Flip, Carry and Practical Use
While many balisongs focus purely on trick-motion or display aesthetics, this model provides credible utility. With premium materials, solid mechanics and meaningful blade size, it serves as a flipping tool, an everyday cutter or a premium collection piece. The user receives value across multiple dimensions rather than a single-purpose novelty.
Usage Scenarios
• Flipping Enthusiast & Skill Practice
For users who enjoy balisong flipping—open/close moves, manipulation, tricks—this knife provides high-quality materials and mechanics, ensuring the performance under repeated use. The balanced handles, bushing/washer hinge system, smooth action and weight reduction holes contribute to a satisfying flipping experience. The stainless steel handles also handle the wear of flipping motions without easily scratching or deforming.
• Everyday Carry (EDC) with Style & Utility
If you carry a knife daily and appreciate both form and function, this balisong fits the bill. The 3.74″ 440C blade gives meaningful cutting power for tasks like slicing packaging, trimming straps, general utility. The stainless steel, blue-hole handles look premium while remaining carryable. The folding balisong format also adds a distinct carry profile for users who want something different yet capable.
• Practical Cutting Use in Gear, Outdoor or Workshop
Beyond flipping and carry, this tool can serve in gear scenarios: cutting cord, webbing, prepping materials, light utility work, or even field carry. The solid blade and strong handle materials mean it is not just for show. For users in outdoor, DIY or workshop contexts who also value design, this knife offers utility with elevated build quality.
• Collection & Rotation Piece for Premium Folding Knives
For knife collectors or gear enthusiasts, this balisong offers both aesthetic appeal and performance. The blade material, handle design and flip-capable format make it suitable for rotation carry or display. It gives a premium feel, flipping dynamics and real world utility, meaning it holds interest in both display context and functional carry/service.
• Travel or Covert Carry (Where Legal) & Statement Tool
In environments where carry discretion or quick deployment matter (and where balisongs are legal), this knife serves as both a tool and statement piece. The mechanisms, materials and build quality allow it to hold up in tougher conditions while the flipping format gets attention. For gear-minded users who travel, commute, or engage in tactical carry, this model offers a distinctive yet capable option.

About Us
At KY-KNIVES, we are dedicated to providing high-performance tools for professionals and enthusiasts alike. Our commitment to quality and innovation is embodied in the MT Customs Marfione Halo V OTF AUTO Knife, a product that stands as a testament to precision and power. With a 4.17-inch Black ELmax Tanto Blade, known for its superior edge retention and corrosion resistance, this knife is designed for those who demand the best. Our aluminum alloy handles offer a lightweight yet sturdy grip, ensuring comfort and control during prolonged use. We pride ourselves on delivering products that not only perform but also enhance the user's experience. Our range of Microtech knives, including the versatile Troodon series, showcases our dedication to adaptability and excellence. Whether you're in the field or at home, KY-KNIVES ensures you have the tools you need to meet any challenge with confidence. Join us in our mission to provide reliable and innovative solutions that cater to your diverse needs.
Contact KY-KNIVES today to upgrade your tactical gear with the MT Customs Marfione Halo V OTF AUTO Knife. Let’s enhance your precision and reliability!
FAQ
Who are we?
We are a trusted provider of high-performance knives, specializing in the MT Customs Marfione Halo V OTF AUTO Knife. Our focus is on delivering precision tools that meet the needs of professionals and enthusiasts alike.
How can we guarantee quality?
We guarantee quality by using premium materials like the Black ELmax Tanto Blade, known for its edge retention and corrosion resistance. Our knives undergo rigorous testing to ensure they meet the highest standards of performance and durability.
What can you buy from us?
You can purchase a range of high-quality knives, including the MT Customs Marfione Halo V, which features a 4.17-inch Black ELmax Tanto Blade and durable aluminum alloy handles. Our selection caters to both tactical and everyday use.
Why should you buy from us not from other suppliers?
Our commitment to quality and innovation sets us apart. We offer knives that combine precision, reliability, and comfort, ensuring you have a tool that performs exceptionally in any situation. Our products are designed to provide long-term value and satisfaction.
What services can we provide?
We provide expert guidance to help you choose the right knife for your needs, along with reliable customer support. Our services include secure online purchasing and prompt delivery to ensure a seamless buying experience.
What’s your return or warranty policy?
We offer a comprehensive return and warranty policy to ensure your satisfaction with our products. If you encounter any issues, our customer service team is ready to assist you with returns or exchanges.
How fast can I receive my order?
We strive to process and ship orders quickly, ensuring you receive your MT Customs Marfione Halo V knife in a timely manner. Delivery times may vary based on your location, but we prioritize efficiency to meet your needs.








