5/16" x 4" Construction Fasteners, T-30U Drive, Bit Included (40 Count) ( GRK RSS 12225 )

Details

The U2 CS is the next generation of construction screws that are replacing lag screws. The "Dome Head" enhances the structural capability. The U2 CS has the essential features: the "Tapper Point" which consists of the "Cork Screw Start" and "Blade Cutting Thread" for easy piercing and alleviating strain on the material. The "Tight Star Recess" system is designed to grasp the U-Bit tightly and can be installed with one hand.