Durable in sheet metal. The Special for Sheet Metal hole saw offers longevity when cutting through metal. Made from bi-metal HSS with an 8% cobalt alloy, it ensures extreme durability and long-lasting cutting performance. The tooth geometry with variable pitch is ideal for sawing with reduced wear on the cutting edge. The depth stop function prevents breakthrough to protect the work surface. This hole saw is suitable 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 supports Bosch's unique Power-Change adapter, which offers the fastest adapter system on the market. It allows for the quick separation and connection of the hole saw and center drill with just one click and is compatible with all cordless and corded drill drivers.