Rockin Beads Brand, 48 Sets Black Gunmetal Cone Screw on Spike Rivet Studs 10x7mm Punk Gothic or Leather Work 48 sets Screw on Rivet Studs Great for custom leather work approx 1/4 Inch (7x6mm Spike) screw back Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card