Kubey Sumo Crossbar Lock M390 DSW Folding Knife [KUB400G]

A compact reverse-tanto titanium folder

The Sumo pairs a reverse-tanto working blade with a titanium grip and thumb-stud opening. Its compact format and angular spine distinguish it from Kubey's longer broad-bladed metal-handle designs. A separate clip supplies pocket attachment with the blade folded away.

Blade, handle and carrying size

• Blade: 3.13" Bohler M390 stainless; stonewash finish
• Handle: Gray stonewash finish titanium
• Mechanism: Crossbar Lock
• Pocket size: 4.13" (10.49cm) closed

Materials and cutting character

M390 is a powder-metallurgy stainless steel with high wear resistance and good corrosion resistance. Its appeal is an edge that resists abrasive wear during repeated cutting; regular light maintenance helps avoid a more demanding full resharpening.

The reverse-tanto profile angles the spine down toward the point while retaining a useful cutting edge beneath it. The result is a distinct tip geometry for controlled utility work.

Titanium gives the handle a corrosion-resistant metal structure. The color and surface treatment describe its finish; they do not change the underlying handle metal.

Crossbar Lock explained

A transverse bar engages the blade to hold it open. Pulling the bar back releases the blade for folding; the release sits near the pivot rather than along the cutting-edge channel.

Specifications