Irwin® Spline Drill Bits Are Made To Fit All Spline Rotary Hammers.
Drill bits are made with a chrome vanadium shaft through-hardened to 50-53HrC. Copper braze material gives high heat resistance for reduced tip loss. Shot-peened double-tempered finish helps reduce breakage. Patented flue geometry allows dust to be quickly cleared from the hole for faster drilling. All tips are made to ANSI specifications.
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