400pcs 73mm Nickel Cone Double Rivet&Stud Collision Nail Metal for Leathercraft Spike GZ015-7(Mix-s) Product Sytle:Rivets Material type: Iron Head width:7mm(approx.: 0.28"),Head Hight:3mm(approx.:0.12") Substructure height5mm(approx.: 0.20"),Substructure width6mm(approx.: 0.31") Attention:Mixed Colors Send. Can NOT pick Colors. Please Clear! Thx