The COBRATAP concrete screws are designed with a high and low thread to cut the concrete more effectively and to keep its alignment. It is made of tempered, high-grade steel to ensure the best torque and maximum holding power and is-coated with the corrosion-resistant Cobra-Coat. The COBRATAP is ACQ compatible and is offered with a flat head or a hexagonal head. The fat head style contains a bonus drill bit in the 10-piece pack, while a drill bit and drive bit are included in all packs of 25 and 100 pieces.High-grade heat-treated steel to ensure the best torque, pull and shear performanceCorrosion-resistant cobra-coat to maximize corrosion resistanceHigh and low thread for an ease of installation and maximum holding power