Microtech Ultratech Gen III ZBP S/E OTF Knife Blue Aluminum, Black M390MK by Tony Marfione (1121-1BL)
- The Ultratech Gen 3 ZBP S/E Blue Aluminum, Black is an upgraded version of Microtech's iconic knife: new glass striker, Crud Kutter system, Dual-Fuel Drive Train and Zero Blade Play™ - no blade play when unfolded.

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.
Ultratech S/E Gen III ZBP Blue Aluminum, Black is the new addition to the Ultratech series - Microtech's first OTF knife without any blade play when unfolded! The blade play free automatic is distinguished by a number of improvements such as; Crud Kutter™, Dual-Fuel Drive Train™, Zero Blade Play™. The Handle was also redesigned, equipping it with solutions known from other models. Working in D/A (Double Action) mode, it allows the blade to be instantly extended and retracted with a single thumb movement. The design by Tony Marfione, owner of Microtech Knives, combines modern design with the highest quality workmanship
Zero Blade Play™ - a redesigned blade locking system, getting rid of the affliction of most OTF knives, i.e. play on the blade when opened.
Dual-Fuel Drive Train™ - an upgraded knife opening/closing system, the mechanism works smoother and requires less force to open/close the knife.
Crud Kutter™ - a series of beveled notches under the opening slide, prevents the accumulation of dirt that could interfere with the opening mechanism.
Ultratech OTF Line - Microtech 's flagship OTFLine model , which set the standard for all Out The Front knives. Ultratech 's proprietary trigger spring design, which remains in the “resting” position at all times, except when used. This prevents the spring from fatigue, reducing wear and tear on the internal trigger mechanisms which ensures that the knife will always function effectively. Light weight, one-handed opening and closing, slim shape of the Handle and sharp blade make it a one-of-a-kind knife, available only from Microtech.
M390MK - thanks to the cooperation of 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 to provide 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 to 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 - machine ground S/E (Single Edge) type, sharpened on one side. Covered with a black protective coating. The blade was brought out with a high flat grind, providing excellent cutting properties. As a result, while maintaining high strength, the knife has excellent piercing properties. The powerful Dual-Fuel Drive Train™ blade extension/retraction mechanism, actuated by a mottled Thumb Slide, a stepped thumb slide, requires for safety the application of a specific force to overcome the spring resistance. The opening method provides a seamless opening for both right- and left-handed people. Under the zipper, the Crud Kutter™ system notches to prevent dirt collection.
Handle - made with excellent precision in 3D technology on CNC milling machines, from Mil-Spec hard-coated aluminum 6061-T6. Blade side deeply engraved with Microtech logo, claw of a bird of prey. The surface texture of the Handle makes the knife non-slip in the hand during use. There are notches (jimping) on the back and bottom of the handle for a more secure grip. Traditional torx screws are used to screw the grips together, which makes it superbly easy to service the knife. The slim profile and milled two-position (right/left) solid titanium deep-carry clip allow the knife to be carried discreetly in a pocket, in tip-down (blade tip down) position. Equipped with a smooth rollerball, which allows the knife to slide easily into the pocket without damaging the edges of the pocket. The Handle is finished with a new version of glass breaker, a steel pyramid, into which a tungsten carbide ball has been pressed. On the back of the Handle there is a hole for interweaving a decorative cord.
Technical data:
Product number: 1121-1 BL
Product name: Ultratech® Gen III ZBP™ S/E Blue Aluminum, Black Standard
Overall length: 216.0 mm / 8.5"
Blade length: 88.9 mm / 3.5"
Blade thickness: 3.17 mm / 0.125"
Handle length: 127.0 mm / 5.0"
Handle thickness: 13.1 mm / 0.515"
Weight: 102.3 g / 3.61 oz
Blade material: Böhler M390MK
Blade hardness: n.d.
Blade grind: Flat
Blade finish: Black coating
Handle material: 6061-T6 Aluminum
Handle finish color: Blue
Backspacer material: 6061-T6 Aluminum
Backspacer color: Blue
Clip: Right/left, Tip-down
Clip material: Titanium
Pivot mechanism: Dual-Fuel Drive Train™
Locking mechanism: Zero Blade Play™ Slide Lock
Opening method: Automatic, push/pull Thumb slider
Additional accessories: None
Designer: Tony Marfione
Brand: Microtech
Manufacturer: Microtech Knives
Country of origin: USA
Developed by: the Sharg® company