Grip-Rite GCB114 1-1/4 in. x 12-Gauge Electrogalvanized Ring Shank Plastic Cap Roofing Nails are designed to secure house wrap, sheathing, and roofing felt. The 1 in. wide plastic cap secures materials to wood roofing underlayment for long-lasting, secure fastening. Ring shank provides extra grip and easy installation. These are some of our most popular, highest-performing round cap roofing nails!