High performance triple chip tungsten carbide tipped hole saw designed for cutting difficult and abrasive materials. Features: Ultra-high hardness : Ensures long life when cutting hard materials such as wood, PVC, and fiberglass. Cutting Depth : 41mm (1-5/8"). Construction : Tungsten carbide tipped for exceptional durability. Specification: Diameter : 40mm Cutting Depth : 41mm (1-5/8") Material : Tungsten carbide tipped