DeWalt DWT1410450 Tapper Pro 6.3 x 127 Blue PH3 Flat Head Screws 100 Pcs FEATURES One-piece self-tapping concrete screw for use in a variety of applications in base materials including concrete, masonry and wood Features a corrosion resistant Perma-Seal coating and an optimised thread design for lower installation torque The screw also incorporates a gimlet drill point for wood (no pre-drilling required) The only concrete screw to meet the 2012 IBC and IRC standards for 4 different base materials Countersunk to sit flush or below the surface of your material SPECIFICATION Pack Qty: 100 Thread: 6.3 mm Length: 127 mm Diameter: 4.8 mm