Size: 228 x 76 x 76mm (9 x 3 x 3in) 3-Stone sharpening system featuring one coarse 325 grit diamond stone and one fine 750 grit diamond stone, as well as one 6-inch Fine Arkansas Stone. Both diamond stones offer an interrupted surface and a Micro-Tool Sharpening Pad for extra care around the tip or for sharpening smaller blades. Moulded plastic base. Suitable for most knives, especially fillet/skinning/kitchen knives as well as general purpose pocket/lock knives.