150 Pack, 1/4" x 2-3/4",Star Drive Concrete Anchors, Tapcon Bit Included, Secure Attachment To Concrete, Block & Brick, 1 Piece Design Requires No Assembly, Does Not Require Anchor Torque Down, Cracked & Seismic Approved, Blue Climaseal Adds Corrosion Resistance, ANSI Drill Bit Required.