The 21° full round head HDG ring shank and smooth shank framing nails has 4 different sizes, including smooth shank: 3-1/2"*.131"+ring shank: 3.0"*.12", 2-1/2"*.12", 2"*.113“ 300 pcs per Size. You can choose different sizes of nails according to actual needs. Smooth and ring shank nails are the most common and are often used for framing and general construction applications. They offer enough holding power for most everyday use, Hot dip galvanized fasteners are generally used for outdoor applications where the fastener is exposed to daily weather conditions such as rain and snow. For 20 to 22 Degree plastic collation framing nailers. Smooth and Shank Full Round Head Plastic Strip Sheathing Nails，quality Q235 ordinary carbon structural steel and HDG Galvanized. Better package protection: Giving the farming nails multiple packagin protection, make sure our customers get the complete nails.