For Quick Easy And Repetitive Installation. Finish: Grey Nylon Plug. Zinc Yellow Passivated Screw. Nylon Plug Body For Longer Life And Durability. Plug Supports Screw Along Total Length. Anti-Rotation Barbs Prevent Plug Rotating In The Hole. Strong Grip In Solid Substrates. Through Fixing Eliminating The Need For Marking And Re-Positioning. Widely Used For Batten Window And Door Frame Fixing. Suitable For Most Masonry Substrates Including Concrete And Brickwork.PTDFORDIRFF860