CONFAST 1/4 x 3-1/4 Hex Head Concrete Screw Anchor with Drill Bit for Anchori...
CONFAST 1/4" x 3-1/4" Hex Head Concrete Screw Anchor with Drill Bit for Anchoring to Masonry, Block or Brick (100 per Box). Therefore, the anchor must be installed so that a minimum of 1" of the anchor is embedded into the concrete.