For simultaneous deburring of both edges of slot or key-wey upto 9 mm with KW-9 and upto 16 mm with KW-16 blade. Ergonomically designed Polyacetal Body handle with special collet to hold plain surface holder and 2 blades Four cutting edges - 2 for std.depth of slot/key-wey and 2 for shallow depth. Cutting edges on 2 sides.