Durable, high-quality plugs for extended fixing life. Zigzag design ensures enhanced expansion. For fixing uPVC, timber, and metal door frames. Rawlplug Countersunk Frame Fixings 125mm x 10mm Durable PA6 Grade Nylon for extended life of fixing. The tough Nylon sleeve prevents distortion during tightening. Anti-rotation lugs prevent spinning in the hole when tightening, even if the hole has been over-drilled. Zigzag design allows greater expansion in an oversized hole. No need for marking out the position of the hole as the fixing is a drill-through application. Pack of 12.