Tapcon Drill Bit or Screw Anchor Drill Bit

Tapcon drill bit or screw anchor drill bit
Used for installing concrete screw anchors. 
These bits meet the specifications of all the major screw manufacturers
Professional quality for fast, efficient drilling
For drilling in brick, Stone  (http://g603.net) , slate, Marble  (http://www.lightemprador.com)  and  (http://maplered.com)  similar masonry Material  (http://g654.org) s 
Dia. 5/32" & 3/16"