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.Select Option Black 220 Grit Extra CoarseBlue 325 Grit CoarseGreen 1200 Grit Extra FineRed 600 Grit Fine Add to Basket Quantity