Irwin 322022 SPEEDHAMMER PLUS MASONRY DRILL BIT, 2-CUTTER, 5/16" X 4" X 6"

Fits all SDS-plus and Hilti TE-C rotary hammers. Reduced area above the flute prevents the drill bit from binding while drilling-the full usable length can be utilized. 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. All tips made to ANSI specifications.