Features: * For drilling in brick, cinder block, and tile * Double flute drills 2 times faster than standard masonry bits * Carbide-tipped for long life * For use in corded and cordless rotary drills only * 5/16 inch diameter * 1/4 inch shank * 11-1/2 inch flute length * 13 inch overall length What"s In The Box: * Vermont American 14045 5/16-Inch x 13-Inch Fast Spiral Masonry Drill Bit