Microtech UTX-85 S/E OTF Knife Turquoise Aluminum, Satin M390 (231-4TQ)
- UTX-85 S/E Turquoise Aluminium, Satin is a compact OTF automatic knife from the UTX-85 series. Designed for EDC applications, it retains all the advantages of larger models. Operating in D/A mode, it features a fast blade extension mechanism.

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.
UTX-85 S/E Turquoise Aluminum, Satin is a compact OTF automatic knife from the UTX-85 series. Designed for EDC applications, it retains all the advantages of the larger models. D/A mode, equipped with a fast blade ejection mechanism.
UTX-85 - 85% the size of Ultratech®, the UTX-85® has been designed to fit perfectly in the hand, making it an excellent choice for everyday carry. The release mechanism is easier to operate than on the full-size Ultratech® and is ideal for smaller or sensitive hands. The UTX-85® still has a fully functional window chisel and all the functions of the full-size Ultratech® model.
M390 - martensitic high-performance chromium steel produced by powder metallurgy. Due to the alloy concept, it is characterized by extremely high wear resistance and high corrosion resistance. Thanks to its high wear resistance, it retains its edge shape, keeping the blade sharp for a very long time (requires minimal maintenance). Another advantage is its resistance to “wire” formation during sharpening. Steel with a high chromium content of 20.0% (Cr) with an admixture of 1.9% carbon (C), 4.0% vanadium (V), 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 type (Single Edge Drop Point), sharpened on one side. Finished with an elegant satin finish. The blade is ground with a high flat grind, which ensures excellent cutting properties. This gives the knife excellent piercing properties while maintaining high durability. The strong blade extension / retraction mechanism with a knurled thumb slide, a stepped slider for the thumb, requires a certain amount of force to overcome the resistance of the spring for safety. The opening mechanism allows for a smooth opening for both right and left-handed people.
Handle - made with high precision in 3D technology on CNC milling machines, from 6061-T6 aluminum. The surface texture of the handle prevents the knife from slipping in the hand during use. There are jimping grooves on the top and bottom of the handle for a secure grip. The slim profile and milled two-position (right/left) solid deep carry clip allow the knife to be carried discreetly in the pocket in a tip-down position. The clip features the Microtech logo, serial number and date of manufacture. The handle ends in a window breaker, a solid steel triangle with a pressed-in tungsten carbide ball. It also has a hole for attaching a decorative cord.
Technical data:
Product number: 231-4TQ
Product name: UTX-85 S/E Turquoise Aluminum, Satin
Overall length: 190.0 mm / 7.5”
Blade length: 79.4 mm / 3.125”
Blade thickness: 3.3 mm / 0.13”
Handle length: 111.0 mm / 4.375”
Handle thickness: 11.9 mm / 0.47”
Weight: 87.9 g / 3.1 oz
Blade material: Böhler M390
Blade hardness: n/a
Blade grinding: Flat
Blade finish: Satin
Handle material: 6061-T6 Aluminum
Handle finish color: Turquoise
Backspacer material: 6061-T6 Aluminum
Backspacer color: Turquoise
Clip: Right / left, Tip-down
Clip material: Stainless Steel
Pivot mechanism: n/a
Lock: Slide Lock
Opening method: Automatic, push/pull Thumb slider
Additional accessories: None
Designer: Microtech Knives
Brand: Microtech Knives
Manufacturer: Microtech Knives
Country of origin: USA
Development: Sharg® company