Irwin 322004 3/16" x 6" Slotted Drive Shaft Plus Masonry Bit (10 Pack)

Fits all SDS-plus and Hilti TE-C rotary hammers. Reduced area above the flute prevents the drill bit from binding while drilling. Chrome vanadium shaft through-hardened to 50-53HrC. Patented tip and flute design removes dust more efficiently, up to 25% faster than other bits. Shot-peened, double-tempered finish reduces breakage. Hot isostatically pressed to extend life and resist breakage. Copper braze material gives high heat resistance for reduced tip loss.