Rockin Beads 48 Sets Steal Tone Cone Screw on Spike Rivet Studs 3/8x1/4" Punk Gothic Scew on Rivet Studs Great for custom leather work 3/8x1/4 Inch (10x5mm Spike) 7x6mm screw back Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card