Drill bit set. Patented carbide tip controlled self centering when starting holes. Patented flute design for rapid dust removal reduces clogging and increases penetration speed. Short drill head forces drilling dust into flute. 140° cutting tip provides more cutting surface. Includes one 5/32" x 6" bit, one 3/16" x 6" bit, one .25" x 6" bit, one .38" s 6" bit, and one .50" x 6" bit. 5 piece set