Durable in Sheet Metal - The Special for Sheet Metal hole saw offers durability when cutting through metal. This hole saw is made from bi-metal HSS (high speed steel), with 8% cobalt alloy, resulting in a lower risk of tooth breakage and higher heat resistance for extreme durability and long lasting cutting. The tooth geometry with Vario toothing is ideal for sawing thin material, with reduced wear on the cutting edge. In addition, a depth stop function prevents breakthroughs to protect the work surface. Use this hole saw for cutting metal sheet with a thickness of less than 5 mm, such as unalloyed steel and stainless steel. It is suitable for all cordless and mains drills. The Special for Sheet Metal hole saw supports Bosch's unique Power Change adapter with the fastest adapter system on the market. It allows you to separate and connect the hole saw and centre drill with just one click. For use with Bosch's Power Change Plus quick-change adapter: for accuracy and robustness.