Bosch HSS Bimetal Holesaw Pilot Drill 81mm

Guides a larger drill to the correct location and eases the job of the larger drill. The self-treading pilot drill screws into the material without damaging or breaking the screw. Allows for the insertion of another hole making tool, that will produce the final-sized hole. Provides high performance and accuracy. The Bimetal Holesaw creates holes for tubing installation and door locks