Starrett bi metal new fast cut tooth holesaws Or Starrett A1 arbor Product information The Fast Cut saw combines a new tooth material, with enhanced heat and wear resistance, and a new tooth design, providing 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”) New tooth material for enhanced heat and wear resistance and greater product life Ideal for stainless and mild steel sheet and tubes with wall thickness of up to 3mm (1/8”) New 5.5 TPI / 25mm tooth form provides a smoother, faster cut in all materials 41mm (1.