SabreCut Revolution bi-metal hole saw kit, supplied in a storage box which includes hole saws, mandrels with adapter and pilot drill bit. Exceptionally sharp bi-metal 4-6 TPI progressive variable tooth profile which results in optimal performance and fast clean cuts up to 48mm deep with little effort. Sidelining slot design for frustration free waste removal eliminating the hassle of dealing with stuck scraps in the hole saw. Made from high quality M42 High Speed Steel (HSS) & 8% Cobalt providing excellent durability and up to 5 times longer service life compared to other hole saws. Universal HEX shank ensures a secure fitting. Suitable for drilling in to aluminium, fiberglass, mild steel, natural wood, plasterboards, plastics, soft metal sheets and wood composites.