Microtech Dirac Delta D/E OTF Knife Orange Tangerine Aluminium, Black M390MK by Tony Marfione (227-1OT)

Microtech Dirac Delta D/E Orange Tangerine Aluminum OTF Folding Knife, Black M390MK by Tony Marfione (227-1OT)

The Microtech Dirac Delta 227-1OT combines a full-size OTF design with a vibrant orange handle and a black M390MK blade. With an overall length of 238.76 mm and a blade length of 96.27 mm, this is a significantly larger and more substantial model than the standard Dirac, while retaining the characteristic front-mounted control system.

The Double Edge Dagger blade has a flat grind and a black finish that contrasts sharply with the Orange Tangerine handle. The Double Action OTF mechanism allows the blade to be automatically extended and retracted, and the slim 10.67 mm-thick body remains comfortable to carry despite its full-size proportions.

M390MK – Durable Steel for a Large Blade

M390MK was developed for Microtech as a high-wear-resistant variant of M390 steel. In practice, this translates to excellent edge retention and high corrosion resistance, which is particularly important for a large, double-edged blade exposed to frequent contact with materials.

Double Edge Dagger and Black

The Double Edge Dagger profile features two symmetrical cutting edges and a centrally positioned tip. The flat grind facilitates controlled cutting, while the black finish gives the blade a more technical look and creates a striking contrast with the orange Handle.

Orange Tangerine Aluminum and Front Slider

The handle is made of Orange Tangerine-colored aluminum. Its slim profile makes it easy to carry, and the body design also incorporates a rear section that serves as a backspacer. The front slide controls the Double-Action OTF mechanism, while the ambidextrous steel clip allows you to carry the knife tip-down on either the right or left side.

Key Features at a Glance

• M390MK – highly wear-resistant steel.
• Double Edge Dagger – symmetrical double-edged blade.
• Flat – flat grind.
• Black – black blade finish.
• Orange Tangerine Aluminum – contrasting aluminum handle.
• Double-Action OTF – automatic opening in both directions.
• Front Slider – slider on the front of the handle.
• 4.32 mm – blade thickness.
• 10.67 mm – slim body.
• Tip-Down Clip – ambidextrous steel clip.

Technical Data

Frequently Asked Questions

What makes M390MK steel unique?

M390MK offers high resistance to wear and corrosion, which is well-suited for a large automatic OTF. When properly sharpened, it maintains good cutting sharpness on both edges for a long time.

How do you sharpen the Double Edge Dagger?

It’s best to sharpen each edge separately using a guided sharpening system or diamond abrasives. Maintaining equal angles on both sides helps preserve a symmetrical profile.

How does the Dirac Delta front slide work?

The slide located on the front of the handle controls both the extension and retraction of the blade. This allows for full one-handed operation of the mechanism.

How do you care for the black finish?

It’s a good idea to clean and dry the surface regularly, especially after exposure to moisture or dirt. Avoid harsh abrasive cleaners, which could accelerate wear on the finish.

Why is the Dirac Delta’s body relatively slim?

With a handle length of 142.49 mm, its thickness is 10.67 mm, which helps reduce bulk when carried. This allows the large OTF to maintain a flatter profile in your pocket.

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