Fits all SDS-max rotary hammers and Hilti TE F, G, and Y rotary hammers. Patented flute geometry removes dust from the hole quicker for fast drilling and long life. Shot-peened, double-tempered finish reduces breakage. Copper braze material gives high heat-resistance for reduced tip loss. All tips made to ANSI specifications. Chrome vanadium shaft through-hardened to 50-53HrC. All sizes 5/8" and up have Irwin's Multi-Cutter 4 cutter design.