Carbide tipped hole saw, the saw body is made of tempered steel. Internal thread M16 for intake of the shank. Drilling in plaster boards, aerated concrete, plastics, chipboards and plywood. Do not use impact drill. With the edge countersink you are able to countersink the lid of a fl ush socket, suitable for hole saw 2160.068. Not compatible with PUMPSHANK® ejector. Please order the adapter shank and the centre drill separately.