Length: 6" Mandrel (rod):2 1/2" Mandrel Thickness: 2mm This Pink Bead Pen is designed to be perfectly balanced after adding your favorite beads. There are 2 1/2 inches of space to place your beads and the threads allow for 1/8" adjustment so you get the perfect fit. The Mandrel (rod) works with beads having this size hole or bigger. Sold individually.