Holesaw set that delivers fast cuts and long life drilling through wood, metal and plastic. Hardened tooth design with 8% additional cobalt provides up to 2 x life when compared to standard bi-metal. Features double tooth design with a combination of shallow and deep shoulders to efficiently remove debris. Large, continuous angled slots provide leverage for easy plug ejection and removal. Durable bi-metal construction provides the versatility to drill a range of materials and a deeper saw design allows for cutting 2-by dimensional lumber in one pass.