DMT Single Sided Diafold Sharpener Extra Coarse, FWX , Black

Amazon

Portable, lightweight with convenient fold & go handles which enclose and protect the diamond whetstone when not in use Extra-Coarse diamond to repair a damaged edge Sharpens knives and tools 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, Weight: 0.12 Pounds, Manufacturer: DMT

Zoro Tools

Diafold whetstones feature a carrying case that unfolds into a permanently attached handle. When folded, this carrying case protects the tool's surface. When unfolded, the handle facilitates ease of use. It reaches virtually anywhere where there is an edge to be honed. The length of the sharpening area is 110mm.

ManoMano

Black Extra Coarse. 220 grit.Size 110mm.