Holesaws designed specifically for quick drilling through sheet steel. Can be used in mild steel, stainless steel and aluminium up to 1.6mm thick. For use with impact drivers. Flared body depth stop for safety and easy tool removal. 0.6mm slimline kerf provides reduced resistance for rapid drilling. HSS cutting edge with 8% cobalt for extra durability. 8 teeth per inch for high smoothness of cut. Internal spring automatically ejects the metal disc for hassle-free drilling.