Concrete Frame Screws are sturdy and reliable. The easy to use through fixing screws permit close to edge applications with no need for marking and re-positioning, and have been Zinc Yellow Passivated for enhanced corrosion resistance. Concrete Frame Screws are perfect for securely fixing timber or uPVC frames to masonry, and their Torx® compatible heads allow for increased torque control. This pack contains 100 x Concrete Frame Screws measuring 7.5mm x 122mm.