Hole saw set for drills and impact drills. The BiM Progressor hole saw offers double the lifespan of its predecessor. For improved durability, it is made with Bosch bi-metal and an 8% cobalt alloy. It features an enhanced progressive tooth design that allows for faster cuts. The diameters are 20, 25, 32, 38, 51, and 64 mm. The set is suitable for all cordless and corded screwdrivers. This hole saw can be used for drilling holes in wood, drywall, plastics, metals, non-ferrous metals, and stainless steel.