Microtech Hera II Mini D/E OTF Knife Tan Aluminium, Black M390MK by Tony Marfione (1702M-1TA)

Microtech Hera II Mini D/E Tan Aluminum, Black M390MK OTF Knife by Tony Marfione (1702M-1TA)

The Microtech Hera II Mini 1702M-1TA is a compact OTF automatic knife with a double-edged, dagger-profile blade made of Böhler M390MK steel. The black blade contrasts with the sand-colored 6061-T6 aluminum handle, creating a subdued and functional configuration for everyday carry.

The double-action OTF mechanism allows the blade to be automatically extended and retracted using the slide. The Hera II Mini generation utilizes the Dual Fuel Drivetrain system and a slide design that facilitates the removal of small debris and reduces friction during operation.

Böhler M390MK – steel developed for Microtech

The blade is made of Böhler M390MK steel, a special grade of M390 developed for Microtech in collaboration with Böhler. The material offers high resistance to corrosion and wear, as well as excellent edge retention.

Double-edged blade, flat grind, and black finish

The symmetrical, double-edged blade with a dagger profile features a centrally located tip and two cutting edges. The flat grind ensures smooth gliding of the blade through the material, while the black finish gives the design a more discreet look.

Sand-finish 6061-T6 aluminum and OTF mechanism

The handle is made of 6061-T6 aluminum in a sand-colored finish. The closed-frame body is an integral construction, so it does not use a separate backspacer.

The blade extends and retracts automatically via a slide mechanism. The design is complemented by a titanium clip—reversible for right- or left-handed use—and a glass breaker also made of 6AL4V titanium.

Key Features at a Glance

• Böhler M390MK — a special grade of M390 developed for Microtech.
• Double-edged dagger-profile blade — symmetrical geometry with a centrally located tip.
• Flat grind — versatile geometry for efficient cutting.
• Black blade finish — a subdued look that contrasts with the sand-colored handle.
• 6061-T6 aluminum — a lightweight and rigid frame material.
• Dual-Action OTF Mechanism — automatic blade extension and retraction with a single slider.
• Dual Fuel Drivetrain — the Hera II Mini’s drive system.
• Integral body — a design without a separate backspacer.
• 6AL4V titanium clip — can be moved to the right or left side, tip down.
• Titanium glass breaker — made of 6AL4V titanium.

Technical data

Frequently Asked Questions

How do I care for Böhler M390MK steel?

After use, it’s a good idea to clean the blade and dry it thoroughly. M390MK is highly corrosion-resistant, but regular care helps keep the surface and edges in good condition.

How do I sharpen the double-edged blade of the Hera II Mini?

Both edges should be sharpened as symmetrically as possible, maintaining the factory geometry. A good starting point is approximately 15–20° per side, using abrasives suitable for high-wear-resistant steel.

How does the double-action OTF mechanism work?

Sliding the slide forward automatically extends the blade, while sliding it backward automatically retracts it into the handle. Both actions are performed by the same mechanism.

How do I clean the aluminum handle?

It is best to clean the surface with a soft, slightly damp cloth, then dry it thoroughly. Avoid harsh chemicals and abrasive materials that could alter the finish.

How do you maintain the Hera II Mini mechanism?

The interior of the mechanism should be protected from excessive dust, sand, and other fine debris. Regular cleaning and the use of products suitable for OTF mechanisms help maintain smooth slider operation.

Prepared by: Specialists at Sharg® company – Your expert in EDC and cutting tools