This Bosch Plumbers HSS Bi Metal Holesaw Set is designed for heating engineers and plumbers, featuring commonly used sizes and a durable plastic carry case. It is suitable for general DIY as well as specific plumbing and heating tasks. The holesaw set offers precision cutting into sheet metal and various other materials including wood, drywall, and metals. Bosch accessories are known for their high quality and long service life. The holesaws are made from Bi-Metal HSS (high-speed steel) with an 8% cobalt alloy, providing enhanced durability, resistance to breakage, and higher heat resistance for extended cutting performance. The Vario tooth strip configuration ensures smooth cuts. The set includes 6 HSS Bi-metal Hole saws (19mm, 22mm, 29mm, 38mm, 44mm, 57mm), two arbors (one for 14-30mm and one for 32-152mm), and pilot drill bits. These holesaws fit all standard adapters on the market. Set contains: 6 x HSS Bi-metal Hole saws: 19, 22, 29, 38, 44, 57mm. 1 x Arbour with Pilot Drill 14-30mm. 1 x Arbour with Pilot Drill 32-152mm. 1 x Allen Key. The set weighs 1.1kgs.