Tapper-Pro Screws Tapper-PRO FLAT HEAD Screws Perma-Seal 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 The screw also incorporates a gimlet drill point for wood (no pre-drilling required) Applications Screen enclosures Exterior metal lighting Storm shutters Marine applications