Microtech Halo IV S/E Marfione Select OTF Knife Black Aluminum, Stonewashed M390MK by Tony Marfione (1150-10MS1)
- Halo 4 S/E Marfione Select Black Aluminium, Stonewashed – a premium OTF automatic knife with an S/A (single-action) mechanism, aluminium handle and M390MK blade. An iconic Tony Marfione design combining technical character with precision craftsmanship.
1 038,12 €This product is intended for use only by adults with knowledge and experience in handling sharp cutting tools. Improper use of the knife can result in serious injuries. The blade is extremely sharp and can easily cut through skin and tissue; therefore, extra caution should always be exercised while cutting, and hands should be kept away from the cutting edge. To prevent the knife from slipping, it is recommended to cut on a stable, non-slip surface and avoid excessive force, which may cause uncontrolled blade movement.
Leaving the knife on the edge of a table, countertop, or in easily accessible places—especially where children are present—poses a significant safety risk. The knife should always be properly secured after use, ideally by placing it on a stable surface or storing it in designated knife blocks, protective sheaths, or magnetic strips. The knife should never be used for tasks it is not designed for, such as opening cans or prying objects, as this can damage the tool and lead to dangerous accidents.
A dull blade increases the risk of injury, as it requires more force and is more likely to slip from the material being cut. Therefore, it is essential to sharpen the knife regularly to maintain optimal sharpness. Additionally, proper cleaning and drying of the knife are necessary to prevent corrosion and bacterial growth. Periodic inspection of the handle and blade is recommended to check for cracks, chips, or looseness. If any damage is detected, the knife should be repaired or replaced immediately.
When using the knife, focus solely on the task at hand—avoid talking on the phone, watching television, or other distractions while cutting. Ensure proper lighting in the workspace for better visibility and control. Please note that some countries or regions have laws restricting the ownership and carrying of knives. Before purchasing or using this knife, verify that its use is legal in your location according to applicable regulations.
Following these safety guidelines will help ensure safe and effective knife use, minimizing the risk of accidents and extending the lifespan of the tool.
Halo IV S/E Marfione Select Black Aluminium, Stonewashed continues one of the most iconic OTF automatic knife lines in the history of Microtech. Designed by Tony Marfione, it is a model created for enthusiasts of precision engineering, uncompromising construction and unmistakably technical design. At the heart of the Halo IV is its characteristic S/A (Single-Action) mechanism, delivering exceptionally fast and forceful blade deployment at the press of a button. This powerful operating system sets the Halo series apart from many contemporary D/A (Double-Action) OTF designs and remains one of the defining features of the model. Every element reflects a strong emphasis on precision and execution. The lightweight aluminium handle, carefully fitted components and distinctive blade geometry create a cohesive construction with a raw, purposeful character. The S/E (Single Edge) Clip Point blade profile offers excellent tip control, precise handling and versatile cutting performance. Its sleek, technical geometry perfectly complements the minimalist form of the knife, while the Stonewashed finish gives the blade a refined, utilitarian appearance and helps conceal minor signs of wear. The Halo IV is aimed at discerning users and collectors who appreciate distinctive mechanics, premium craftsmanship and one of the most recognizable designs ever created by Microtech Knives.
S/A (Single-Action) OTF – an automatic mechanism in which the spring energy is used exclusively to deploy the blade. When the button is pressed, the lock is released and the blade rapidly extends from the handle and locks in the open position. As a result, the S/A OTF mechanism provides a very fast, decisive opening action that takes less than one second. Unlike D/A (Double-Action) mechanisms, the S/A system does not retract the blade automatically. After use, the blade must be manually retracted and the spring re-cocked using a lever located at the rear of the handle. This resets the mechanism and prepares it for the next automatic deployment. One of the main advantages of the Single-Action OTF design is its relatively simple and robust mechanism. The reduced number of components responsible for blade movement can contribute to high durability and reliability, while the simpler construction allows the use of a powerful spring mechanism that provides very fast and decisive blade deployment. For this reason, this solution is often used in large, heavy-duty automatic OTF knives.
Marfione Select is an exclusive line of knives, combining Microtech innovation with the artisanal precision characteristic of custom knives. Created under the guidance of Anthony Marfione, each knife in the series features unique materials, finishes and the utmost attention to detail. These knives are not only tools, but also works of art, valued by collectors and knife enthusiasts around the world.
M390MK - thanks to a collaboration between Microtech and Böhler engineers, an exclusive version of M390 steel made only for Microtech was created. The carbon content has been increased and subjected to closer scrutiny thus improving the properties of M390 steel for better edge retention, corrosion resistance and polishing. Martensitic high-performance chromium steel produced by powder metallurgy. Due to its alloy concept, it has extremely high wear resistance and high corrosion resistance. Due to its high wear resistance, it adequately maintains the shape of the edge, so the blade stays sharp for a very long time (requiring minimal maintenance). Another of the advantages is resistance to the formation of “wire” during sharpening. The steel has a high chromium content of 19.0% (Cr) doped with 1.95% carbon (C), vanadium 4.0% (V), and is hardened between 59-61 HRC. This super steel is comparable to Carpenter's CPM 20CV or CTS-204P steels. Manufactured by Böhler Edelstahl in Kapfenberg, Austria.
Blade - from M390MK, a special version of powder steel developed for Microtech Knives, combining high hardness, edge stability and corrosion resistance. Its parameters have been optimized for use in designs with a dynamic OTF mechanism, where both durability and predictability of operation are important. The Single Edge Clip Point profile ensures precision in cutting, good penetration and clean movement geometry. The flat grind promotes blade aggression while maintaining durability and the ability to accurately control the trajectory. The stonewashed finish reduces light reflections and masks signs of use, important for heavy use and aesthetics. Additional relief holes and a fuller reduce the weight of the blade, facilitating smooth extension and return, while also fitting in with the technical aesthetic - cool, austere, based on engineering rather than decoration. This Blade is designed for mechanical enthusiasts and conscious users of premium tools .
Handle - made of anodized aerospace aluminum, CNC-machined, which guarantees high structural rigidity and perfect fit of the components. Its elongated profile allows for a secure grip and optimizes control of the knife both during handling and on the job. The IV version is distinguished by holes on the back, which give access to cleaning the mechanics inside the knife - a unique procedure that emphasizes the industrial character of the design. The rear segment of the spring tension lever is finished with a glass breaker, which increases functionality in emergency situations and completes the utility form. The surface of the aluminum was finished to provide a good grip without aggressive texturing, maintaining clean lines and comfort. Milled from titanium, the single-position (right) clip allows the knife to be carried in a tip-down position (blade tip down). The clip is equipped with a smooth rollerball, thanks to which the knife slides into the pocket lightly and smoothly, without damaging the edges of the pocket. The whole design creates a Handle that is minimalist, expressive and subordinated to the function of the action - in accordance with the philosophy of Tony Marfione, who for years has set the standard for premium OTF automatic knives .
Technical data:
Product number: 1150-10 MS1
Product name: Halo® IV S/E Marfione Select Signature Black Aluminum, Stonewashed Standard
Overall length: 235.0 mm / 9.25"
Blade length: 98.4 mm / 3.875"
Blade thickness: 3.2 mm / 0.125"
Handle length: 137.0 mm / 5.375"
Handle thickness: 11.0 mm / 0.435"
Weight: 116.0 g / 4.09 oz
Blade material: Böhler M390MK
Blade hardness: n.d.
Blade grind: Flat
Blade finish: Stonewashed
Handle material: 6061-T6 Aluminum
Handle finish color: Black
Backspacer material: 6061-T6 Aluminum
Backspacer color: Black
Clip: Right, Tip-down
Clip material: Titanium
Pivot mechanism: Single Action
Locking mechanism: Button Lock
Opening method: Automatic, thumb button
Additional accessories: None
Designer: Tony Marfione
Brand: Microtech Knives
Manufacturer: Microtech Knives
Country of origin: USA
Developed by: the Sharg® company
Pietta 1851 Colt Navy Yank Steel Snubnose .44 Revolver (YAS44MTLC)
Microtech Socom Elite T/E-M Knife Blue Aluminium, Black M390MK by Tony Marfione (161-1BL)
