Carbide-tipped hole saw with saw body made of tempered steel, M16 internal thread for holding the shank, sawing in plasterboard, aerated concrete, Heraklith, plastics, chipboard, plywood, always work without impact, use the hole countersink to countersink the collar of a cavity wall box to match the 2160.068, not compatible with PUMPSHANK® ejector shank, please order pick-up saw and centring drill separately