Monument high-quality holesaws have an integral shank with M42 Cobalt High Speed Steel cutting blades with variable pitch teeth. Supplied with a split point HSS pilot drill which reduces skidding on convex surfaces, eliminating the need for pre-punching. For use on stainless steel, cast iron, mild and galvanised steel, aluminium, copper, brass, plastics and wood. Generally no cutting fluids are required, but for cast iron use paraffin and for stainless steel use a cutting compound.