28/34Degree, D-Head. Shank Diameter: 2.87--3.33mm, Shank Type: Smooth,Ring Shank,Galvanized Ring Shank, Galvanized Smooth,Meachanical Galvanized,Hot-Dipped, Length: 2.87x(50,57,60,64,70,75) 3.1x(70,75,83,90) 3.33x(75,85,90,95) We will offer you products with top quality and competitive prices, welcome your specific inquiry.