This knife comes from a special government project to equip Japanese special police forces. Mr Juno Matsuda personally participated in the design, production and final test of the prototype knife. After several months of hard work, he finally created this perfect knife to meet the extremely high requirements of the special police. His grinding technology and clam blades made it possible. Extra-thick convex grinding clam blade is strong enough to penetrate walls and bodies and pry open doors and windows. This brand has developed rapidly. Brand Kikuda Matsuda Hayabusa Model KM-930 Blade Material D-2 Blade Length 23.5CM Blade Length 1 1.4CM Blade Thickness 0.59CM Blade Width 3.7CM Hardness 60HRC Blade Material Mikata (Micarta) Japan Accessories Kydex Sheath.