Keep your hammer-drill armed and ready with these 5/16-inch Masonry Drill Bits. Specifically designed for blasting through concrete, stone and other masonry materials, these rugged bits feature thick carbide-tips and superior dust-extracting flutes that increase the efficiency of material removal. This drill bit has a 5/16-inch bit diameter and shank diameter.
- Four flute design cleans debris out for fast, efficient drilling
- Three flats on shank eliminate bit slipping in chuck