Ultra portable, key chain sharpener;Extra-Coarse diamond to repair damaged edge;Sharpens knives faster than conventional stones with DMT's monocrystalline diamond surface;No oil is needed-sharpen dry or with water;Durable construction will provide years of consistent performance and reliable service

• Dmt F70x Black Mini Sharp 220grit - Extra Coarse

Dmt F70x Black Mini Sharp 220grit - Extra CoarseDMT