The Progressor for Wood and Metal hole saw is a durable hole saw for fast cuts in wood and metal. Progressive toothing provides optimum cutting performance and fast chip ejection. This hole saw is made from bi-metal HSS (high speed steel), with 8% cobalt alloy, so there is less risk of tooth breakage and higher heat resistance for extreme durability and longevity. This hole saw is suitable for cutting wood, metal and plastic. The Progressor for Wood and 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. It is suitable for all cordless and mains drill screwdrivers.