Pull gently open, line up posts with holes, and squeeze gently shut. Accommodates beads from 4 mm up to about 8 mm thick, with a little finessing. Post is .9 mm thick. Instantly turns a bead with a forward facing hole into a lovely pendant - as you can see from the example in the photo - using the 28 mm Kaputt pendant in Crystal Metallic Blue (not included).

6mm x 20mm By the each.