Variable pitched bi-metal hole saw suitable for multi use. The hole saw offers a smooth and fast cutting action. The hole saw has a 38mm cutting depth and precision set teeth for aggressive material penetration and swarf clearance. The hole saw can be used to cut a wide range of think and thick gauge materials including Steel, Aluminium, Sheet Metals, Mild Metals, Non-ferrous Metals, Cast Iron, Hard and Soft wood and PVC.