Microtech Scarab II Gen III D/E-S OTF Knife Tan Aluminum, Stonewashed M390MK by Tony Marfione (1180-10TA)

Microtech Scarab II Gen III D/E-S Tan Aluminum, Stonewashed M390MK by Tony Marfione (1180-10TA) – full-size tactical-class OTF automatic knife

The Microtech Scarab II Gen III D/E-S Tan Aluminum, Stonewashed M390MK by Tony Marfione (1180-10TA) is a full-size OTF automatic knife featuring the D/A system, designed as a robust, advanced construction for heavy-duty use. This model expands the Scarab II Gen III line, combining a large blade, reliable ergonomics, and mechanics built to withstand demanding conditions. The blade, made of Böhler M390MK steel, features a D/E-S Spear Point profile, a flat grind, and a Stonewashed finish, creating a configuration optimized for effective piercing, controlled cutting, and high durability. The handle is made of 6061 -T6 aluminum / 3M Traction Tape Inlay in a Tan / Black configuration, an automatic OTF mechanism with a dual spring system, a Thumb Slide, a right/left clip, tip-down orientation, and a glass breaker reinforce the practical and tactical character of the Scarab II Gen III model.

Böhler M390MK – Microtech powder steel for demanding use

Böhler M390MK is a high-performance powder steel developed for Microtech in collaboration with Böhler, designed with an emphasis on wear and corrosion resistance as well as long-lasting sharpness. In the Scarab II Gen III model, this material performs well when cutting straps, cords, tapes, cardboard, plastics, and technical materials, where edge stability and predictable blade performance are essential. The Stonewashed finish gives the blade a rugged, technical look and helps mask minor scratches that occur during regular use.

D/E-S Spear Point and flat grind – symmetry, penetration, and control

The D/E-S Spear Point profile features a double-edged blade with symmetrical geometry, designed for precise tip control and effective piercing. Full-length grain grooves on both sides of the blade visually reinforce the construction and emphasize the technical character of the Scarab II model. The flat grind facilitates smooth cutting through materials while maintaining an optimal balance between cutting edge sharpness and durability. This combination allows the D/E-S variant to effectively blend the task-oriented nature of a large OTF knife with the high-quality craftsmanship typical of Microtech.

Dual OTF and Thumb Slide Mechanism – Power, Speed, and Reliability

The Scarab II Gen III utilizes the automatic D/A OTF mechanism, which allows the blade to be extended and retracted using the same Thumb Slide. This generation features a dual spring system, increasing the mechanism’s operating force and smoothness compared to older designs. The knurled slide with a distinctive “X” pattern in the center requires deliberate pressure, which enhances safety and reduces the risk of accidental activation. The design allows for comfortable use with both the right and left hand.

Tan Aluminum and 3M Traction Tape Inlay – a stable grip for a large OTF

The handle, made of 6061-T6 Aluminum / 3M Traction Tape Inlay, was designed with a focus on rigidity, durability, and a secure grip. The Tan aluminum body gives the knife a tactical, subdued character, while the 3M Traction Tape Inlay increases hand grip during heavy-duty work, even when wearing gloves or in less stable conditions. Jimping on the spine and spine base improves grip control, and the massive right/left deep-carry, tip-down clip allows for discreet carrying of the knife. A window breaker with a tungsten carbide ball expands the knife’s functionality in emergency situations.

Why choose the Microtech Scarab II Gen III D/E-S Tan Aluminum?

The Microtech Scarab II Gen III D/E-S Tan Aluminum is designed for users who expect a large OTF automatic knife with robust mechanics, a stable handle, and premium materials. Böhler M390MK steel ensures long-lasting edge performance, the D/E-S Spear Point profile enhances precision during point-cutting tasks, and the D/A OTF mechanism allows for quick one-handed deployment and retraction of the blade. The handle, made of 6061-T6 aluminum with 3M Traction Tape Inlay, provides a secure grip; the right/left-hand clip and tip-down orientation allow for customizable carrying styles; and the glass breaker reinforces the knife’s utility. This is a full-size OTF knife for those who value strength, precision, and Microtech’s signature quality.

Key features at a glance

• Böhler M390MK — high-performance powder-coated steel.
• D/E-S Spear Point — double-beveled blade with symmetrical geometry.
• Flat grind — effective blade glide through material.
• Stonewashed — a rugged finish that masks minor wear marks.
• D/A OTF — automatic blade deployment and retraction via a slide mechanism.
• 3M Traction Tape Inlay — a texture that improves grip stability.

Technical Data

Frequently Asked Questions

How to care for and sharpen the Böhler M390MK steel in the Scarab II Gen III model?

Böhler M390MK steel should be cleaned and dried after use, especially after contact with moisture, sweat, or debris from cut materials. A diamond sharpener or a high-quality ceramic system works best for sharpening, as powder steel with high wear resistance requires an effective abrasive and a stable angle.

How does the D/A OTF mechanism work in the Microtech Scarab II?

The D/A OTF mechanism allows the blade to be extended and retracted by sliding the same Thumb Slide. The blade moves forward and backward along the handle axis, so the knife can be operated with one hand without the need for a classic side-fold mechanism.

What makes the D/E-S Spear Point profile stand out?

D/E-S Spear Point refers to a double-edged blade with symmetrical geometry, designed for precise tip control and effective piercing. This profile is well-suited for a full-size, task-oriented OTF knife.

What does the 3M Traction Tape Inlay offer?

3M Traction Tape Inlay is an inlay with a non-slip texture that improves grip stability. It facilitates control of a large OTF knife during heavy-duty work, even when wearing gloves or in less stable conditions.

Does the Microtech Scarab II Gen III have a glass breaker?

Yes, the handle features a glass breaker with a tungsten carbide ball. This is a structural element of the knife that expands its functionality in emergency situations, but it is not listed as a separate accessory in the technical data.

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