Designed for framing and sheathing applications, the 3 in. x 0.131 in. 21° Round Head Framing Nails are ideal for exterior use on treated lumber. They feature a thick galvanized coating for corrosion resistance and a full round head in addition to a ring shank for an extra powerful hold. The nails are plastic collated for fast and reliable feeding. Works with most 21° framing nailers.