Holesaw Adaptors. A range of high quality adaptors for DURO holesaws including the DU-DHS multi purpose diamond holesaws and the D-BHS bi metal holesaws.Allow holesaws to be driven by either SDS Plus or 3 Jaw chuck rotary power tools.USE ME FOR…Allow holesaws to be driven by either SDS Plus or 3 jaw chuck rotary power tools. There are 2 sizes of adaptors to cover the full range of holesaws.