Rockin Beads Brand, 19 Sets Steal Tone Cone Screw on Spike Rivet Studs 25x8mm 1 Inch Spike Punk Gothic or Leather Work Scew on Rivet Studs Great for custom leather work approx 1 Inch (25mm Spike) screw back Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card