... GC 4.Girt:60#~600# 5.Quick sharpening sharpening stone,hand grinding and sharpening,mainly used for grinding woodworking tools,cutting tools ... , and etc. Such as for sharping or reconditioning chisels,knives,scythes,axes,scissors,etc. Use Aluminum Oxide stone for harder ... steels.Use Silicon Carbide stone for working on softer metals,such as ...