10pcs 740mm Screwback Spikes Cone Studs Silver Golden Punk Rock Leathercraft Rivet GZ025-40+B6S(Mix-s) Product TypeRivets MaterialCopper Head Diameter: 7*40mm (approx.:0.27* 1.57 ") Screw's Height:5.5mm,Width: 7mm Attention:Mixed Colors Send. Can NOT pick Colors. Please Clear! Thx