This 6-piece set is ideal if you want to prepare plumbing and electrical installations and drill in metal (especially stainless steel), plastic, soft and medium-hard wood, insulation and drywall boards. It contains 5 hole saw inserts made of bi-metal Ø 25, 29, 35, 51 and 68 mm and a mandrel with 6-Ø-mm centre drill bit made of high-speed steel (HSS). This allows you to achieve precise holes with a cutting depth of 40 mm. The hexagonal shank allows the hole saw inserts to be quickly locked in the chuck of your drill or cordless screwdriver. You receive the set in a high-quality 2-component plastic box in which you can transport the parts safely and store them neatly. The hole saw inserts are TÜV-tested - so you can rely on safe quality products.