AutoStart Pilot Bit for Diamond Hole Saws,

Heavy-duty hex shank. Easily snaps into mandrel. Construction hardened steel with retractable center pin and carbide tip.- Shank size 1/4" hex
- For diamond hole saws 3/4"-4-1/8"
- For use with mandrels PCM38, PCM12, PCMDSPL
- For use with Bosch diamond hole saws 3/4" or larger