Atlas Screws, also called masonry frame screws, are designed to screw directly into both frame and masonry eliminating the need for a plug. A fast secure fastening often used as an alternative to hammer and frame fixings. Supplied in plastic bags with euroslots for hanging and labels with your own name. A high performance fixings with the added advantages: Faster installation with and instant fix, Non-expansion fixing, suitable for close edge fixing, Deep T-30 head to reduce cam out, Zinc & yellow passivated finish, 3 serrated V threads for optimum insertion and debris removal, Hi-Lo thread for a superior hold.