The Special for Sheet Metal hole saw offers durability when cutting through metal. This hole saw is made of bi-metal HSS (high-speed steel) with an 8% cobalt alloy, which reduces the risk of tooth breakage and provides higher heat resistance for extreme durability and long-lasting cutting. The tooth geometry with variable pitch is ideally suited for sawing thin materials, while minimizing wear on the cutting edge. Additionally, a depth stop feature 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 the quick separation and connection of the hole saw and center drill with just one click.