The Progressor for Wood and Metal is a durable hole saw for fast cuts in wood and metal. A progressive tooth strip provides optimal cutting performance and fast chip clearance. Made of bi-metal HSS (high-speed steel) containing 8% cobalt alloy, this hole saw has less risk of tooth breakage and higher heat resistance for extreme resilience and durability. Use this hole saw when cutting wood, metal and plastics. It is suitable for use with all corded and cordless drill drivers.