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. Cuts Softwood, Chipboard, Brick, Soft Tiles, Fibre Plastics, GFK & CFK Steel Slotted Barrel to Aid Removal of Debris 20mm - 76mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action Carbide Technology Cuts Softwood, Chipboard, Brick, Soft Tiles, Fibre Plastics, GFK & CFK Steel Slotted Barrel to Aid Removal of Debris 20mm - 76mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action Carbide Technology