The RUKO H.S.S. bi-metal hole saw with varied toothing ensures that the cut is more even and requires less effort. The reduction in vibration and heat development during cutting achieves up to three times the tool life. Suitable for: Unalloyed steel (up to 700 N/mm² strength), non-ferrous and light metals, plastics, plasterboard and light building boards, fiberboard, plywood and wood.