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