Prime Source 1PRCAP1 Plastic Caps Prime Source 1PRCAP1 Plastic Caps Features: Caps are electrogalvanized for additional corrosion resistance and are ring shanked for increased holding power The large head is ideal for holding roofing felt, sheathing, poly, and other materials in place that are prone to tearing when attached with a regular nail Plastic 1" head 1 lb box 1PRCAP1: 1" 114PRCAP1: 1-1/4" 112PRCAP1: 1-1/2" 3PRCAP1: 3"