Bahco Sandflex® Variable Pitch Holesaw made for high precision cutting of holes from 14mm to 152mm diameter in all sawable materials up to 29mm thick. Suitable for use in portable electric or pneumatic tools, and in a wide variety of drilling, boring, milling and other machine tools. Cutting edges are in high speed steel for extra hardness, with welded seams for accuracy of cut, and heat-treated bodies for maximum strength. All saws have varipitch (4-6tpi) blades. Supplied in cardboard box.Size: 20 mm. Arbors to suit (available separately). Code Holesaw Size ShankBAH3834930 930 14-30 mm 3/8 Inch (8.5mm).BAH38341130 1130 14-30 mm 7/16 Inch (11.1mm).BAH38349100 9100 32-100 mm 3/8 Inch (8.5mm).BAH383411152 11152 32-210 mm 1/2 Inch (11.1mm).BAH383411152C 11152 32-210 mm 1/2 Inch (11.1mm).BAH383416152 16152 32-210 mm 5/8 Inch (15.4mm).