Silver base metal thick pendant base, overall length: 5.1cm, length of 'beadable' section: 3.4cm, thickness of rod: 1.2mm, diameter of screw off ball: 6mm, diameter of hole at top of pin: 2.1mm. Sold per piece. These new pendant pins have a ball on the bottom that screws off, allowing you to thread beads with larger holes up onto the pin. The very top of the pin has a hole in it, allowing you to thread it onto a chain, or bead it into a necklace. These key chains are particularly suitable for our large range of large holed glass and metal beads.