- Box clasps are two-piece clasps that open when you push down on the exterior lever of a wedge-shaped piece of metal, compressing it so that it slides out of the opening. Beads.us available in various of box clasps from different metail including 925 sterling silver, brass, zinc alloy, shell and so forth. These jewelry box clasps feature a mechanism within that's easy to squeeze open and closed, but will keep designs in place when worn. The clasping mechanism fits into the box within the clasp and locks into place. Whether you are making necklaces or bracelets, clasps are often a must-have for designs. More kind of new style box clasps are added soon, welcome to place order at Beads.us and feel free to contact us if any question.