Hole saws of the highest quality, with cutting edges in 8% Cobalt steel for the most demanding jobs; professional and deep cutting in stainless steel, hard steels, cast iron, aluminium, bronze, brass, hardwood and derivatives, synthetic resins, plastic laminates, hard rubber, plasterboard, and many other materials.
Thread size UNF 1/2 X 20 for diameters from 14 to 30
Thread size UNF 5/8 X 18 for diameters from 31 to 305