Faithfull Bi-Metal Cobalt Holesaws with precision set teeth for aggressive material penetration and swarf clearance. This also provides a smooth, fast cutting action. Manufactured from bi-metal material with a 8% cobalt content for increased heat and wear resisitance for greater product life. Will cut thin and thick guage materials. Ideal for use on a wide variety of materials including: stainless steel, steel, aluminium, sheet metal, mild metal, non-ferrous metals, cast iron, soft/hard wood and PVC. Suitable for use in most variable speed power drills. Specification Cutting Depth: 38mmDiameter: 57mmAdditional Information:• Size (mm): 57• Material: Bi-Metal• Pitch: Variable