This chisel made of stainless steel with black anti-rust coating ensures long life and elegant appearance; Roller design with open end ME ring, good booster roller, easy movement forward and backward while sharpening, same direction, non-slip, smooth and safe, keep the split ring design, make sure the refined roller is not there, but always stay focused; Adjustable width, set the width by twisting the cap Widest flat iron/scissor: up to 77mm/47mm Dimensions (LxWxH): approx. 9 x 4 x 3.3 cm; Turn the cap counterclockwise, hold it with a pair of scissors or other tools with pliers, and twist it up and down to fit the 'angle. Then remove the cover clockwise, smooth the blade on a stone grinder or stone grinder, push the knife back and forth to revive your tool; Multi tools -purposes, wood chisels, cheese knives, blades, gravel, flat slicing knives, iron, sharpening guides to help them become better craftsmen.