Bi-metal Fast Cut holesaws combine a brand new tooth material, boasting enhanced durability and a new tooth design that provides a smoother, faster cut on a wide range of materials, when compared against the previous Constant Pitch saw. Specifically suited to cutting stainless and mild steel sheet, the Fast Cut will also cut through tubes with a wall thickness of up to 3mm (1/8"). Features and Benefits New tooth design, providing a smoother, faster cut on almost all materials Enhanced heat and wear resistance Specifically suited to cutting stainless and mild steel sheet Will also cut through tubes with a wall thickness of up to 3mm Notes Images for illustrative purposes only