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 piece set includes 3/16", 1/4", 5/16", 3/8", and 1/2" drill bits Packaged in a plastic storage case 2-3/4" flute length 1/4" shank 4" overall length Carded