Irwin Speed Hammer Drill Bit *Sub Brand: Speedhammer Plus *Material: Steel *Shank Type: SDS Plus Shank *Drill Bit Diameter: 5/16 in. *Dril Bit Length: 6 in. *Product Type: Drill Bit *Number of Pieces: 1 pc. *Application: Masonry *Shank Diameter: 1/4 in. *Packaging Type: Carded *4" flute. Fits all SDS-plus and Hiliti TE-C rotary hammers. Reduced are above the flute prevents drill bit from binding while drilling. Chrome vanadium shaft. Patented tip and flute design removes dust more efficiently. Hot isostatically pressed to extend life and resist breakage. All tips made to ANSI specifications.