Bosch 2608584670 HSS-Bimetal Progressor Holesaw Kit 9 Piece The Bosch 9 Piece HSS-Bimetal Progressor Holesaw Kit contains 6 holesaws in sizes from 20mm to 64mm or 25/32 inch to 2.1/2 inch. Suited to cutting both wood and metal they are made with 8% Cobalt Alloy. Features: Progressor holesaw kit for wood and metal For the toughest demands - quickly and steadily through a wide variety of materials Progressive tooth strip for high performance and fast chip clearance HSS bi-metal with 8% cobalt alloy for extreme resilience and a long lifetime Power change adapter for a fast and safe attachment and release of the pilot drill bit and holesaw, with just one click The cutting quality depends on the correct speed and the coolant used (see operating instructions) Comes with: 6 holesaws 1 Power-Change adapter 2 HSS-Co pilot drill bits Kitbox Specification: Diameter (mm): 20.0 / 25.0 / 32.0 / 38.0 / 51.0 / 64.0