Rockin Beads Brand, 20 Shiny Silver Plated Flat Sided 1 3/8 Inch Split Key Ring Connectors Steel Alloy 20 Shiny Silver Plated Flat Sided 1 3/8 Inch 30mm outside Split Key Ring Connectors Steel Alloy thickness approz 3mm Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card