Bosch Carbide Technology is an optimum mix of the hardest metals and ensures long life. Lasts up to 50x longer than a HCS holesaw in tough materials. Ideal for work on building sites or renovation work. Large slots are optimised for fast chip removal. For use with the Bosch Power Change Plus keyless arbor with 105mm pilot drill bit (arbor and replacement pilot drill bits for use with brick and soft tiles, or wood, drywall, plastics and metal, all available separately). Cuts Softwood, Chipboard, Brick, Soft Tiles, Fibre Plastics, GFK & CFK PowerChange Plus Arbor Steel Slotted Barrel to Aid Removal of Debris Can be Used with Rotary & Impact Modes Cuts Softwood, Chipboard, Brick, Soft Tiles, Fibre Plastics, GFK & CFK PowerChange Plus Arbor Steel Slotted Barrel to Aid Removal of Debris Can be Used with Rotary & Impact Modes