ISOMARS Paper Cutter widely used in industry as the top sharpening material. It is virtually everlasting, keeps its shape and sharpens the hardest materials eg. ceramic,stainless steel to the finest edge. The unique design of the file cross-section allows the sharpening of a multitude of different items . The sharpening rod can be retracted and stored within the anodised aluminium case. Simply twist the sleeve to lock/release the tool.