Milwuakee 14 Piece Contrator Bi-Metal Holesaw Set is optimsed variable 4/6 tooth geometry for cutting cutting and universal use. The Holesaws have Bi-Metal teeth for the best durability and increased wear resistance. The Holesaws can be used on material such as steel, non-ferrous metals, wood, drywall plasterboard and plastics. This set can be used with the Milwuakee M18 Brushless Percussion Drill. Features and Benefits • Bi-Metal Teeth • For Universal Use • Optimised Tooth Geometry For Faster Cutting • 14 Piece Set Contents • 10 HoleSaws In Sizes: 19, 22, 25, 29, 32, 35, 38, 44, 51 and 57mm • Arbor for 14-30mm • Arbor for 32 - 152mm • 2 x Pilot Drill Bits • 1 x Allen Key