This Holesaw Set comes in sizes: 20, 25, 32, 40, 51 and 65mm. Only one arbour is needed for the range with quick release pilot drill and core body. Arbor can also be used on 16 - 152mm Holesaws. This not only allows speedy size changes but is also a safer method for the user. Manufactured from HSS Bi-Metal with 8% cobalt and progressive tooth geometry which ensures long service life and high cutting speeds. Suitable for ferrous and non ferrous metal, stainless steel, aluminium, wood and plastics.