DeWALT DW5229 Percussion Bit Hammer Drill Bit, 7 in L Flute, Flat Shank, 5/16 in Dia Shank

Power through masonry, concrete, rock and more with DeWALT hammer drill bits. Featuring rock carbide tips that maximize surface contact for extended bit life and a 4-flute design that cleans debris while you work. Three flats on the shank eliminate bit slippage.