As versatile as your requirements The 9-piece hole saw set for electricians contains all you could need for electrical installations. It allows you to start right away, as the pilot drill bit and Power Change Adapter are already included. An improved progressive tooth strip in the hole saw gives a faster cut. The Power Change Plus Adapter allows you to change the hole saws with a single click. The HSS pilot drill bits are more robust and precise than their predecessors making them the perfect choice for precise pilot drill holes. The Hole Saws are ideal for cutting holes in wood, drywalls, plastics, metals, non-ferrous metals and stainless steel. They are suitable for all cordless and mains drill drivers. Scope of delivery: 11 x Hole Saw Progressor for Wood & Metal Electrician's Set– Ø 20 / 22 / 25 / 32 / 35 / 40 / 44 / 51 / 60 / 68 / 76 mm, working length: 44 mm 1 x Power-Change Plus hexagonal shank 11 mm 2 x HSS pilot drill bits