Durable in sheet metal. The Special for Sheet Metal hole saw offers longevity when cutting through metal. It is made from bi-metal HSS with an 8% cobalt alloy, ensuring extreme durability and long-lasting cutting performance. The tooth geometry with variable pitch is ideal for sawing thin materials, as it reduces wear on the cutting edge. A depth stop function prevents breakthrough and protects 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 is compatible with Bosch's unique Power-Change adapter, which provides 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 suitable for all cordless and corded drill drivers.