• Compact set with popular sizes for plumbing • Sandflex® bi-metal holesaws are specifically designed for metal cutting but can also be used in most materials such as wood and plastics • The holesaw cuts ferrous metals (steel, stainless steel, cast iron) and non-ferrous metals (aluminium, brass, copper) • Maximum cutting depth 38 mm (1‑1/2") • 4/6 teeth per inch • Arbours require a power drill with 13 mm chuck • Bi-metal construction with 8% cobalt