Features. Hot Dipped Galvanized Steel Nail Full Round Head. Pack of 6 Specifications: Color: Gray. Hot Dipped Galvanized. Gauge: 7. Head Diameter: 0.375 in. Head Type: Full Round. Length: 4.5 in. Material: Steel. Barn Post Nail Type: Point Type: Diamond. Shank Type: Ring Shank. Ring Size: 30D. Pack Size: 5. Indoor or Outdoor. Weight: 31.72 lbs