The Special for Sheet Metal hole saw offers durability when cutting metal. This hole saw is made from bi-metal HSS (high-speed steel) with an 8% cobalt alloy, resulting in a lower risk of tooth breakage and higher heat resistance for extreme durability and long-lasting cutting performance. The tooth geometry with variable tooth design is ideally suited for sawing thin materials while reducing wear on the cutting edge. Additionally, a depth stop function prevents breakthrough to protect the work surface. Use this hole saw for cutting sheet metal with a thickness of less than 5 mm, such as unalloyed steel and stainless steel. The Special for Sheet Metal hole saw is compatible with Bosch's unique Power-Change adapter, featuring the fastest adapter system on the market, allowing for quick separation and connection of the hole saw and center drill with just one click.