Beautiful Bead Square 8 Strand Slide Lock Box Clasps for Jewelry Making Golden Color Material: made of alloy, very durable and lasting, easy and perfect closure for bracelet, necklace and jewelry making. Size:with length of 3.8cm and width of 1.6cm They work especially great with pearls. Stay closed perfectly; don't slip out. Easy to open. Great for jewelry DIY. Used for:Jewelry making, necklace DIY, bracelet DIY, either it is pearl, coral, jade or spar neclace and bracelet. It is the sophisticated and perfect clasps accessories for your jewelry making. A perfect ending to a several tiers choker, the locking mechanism is very secure and the look is very nice. It protects your necklace from being flimsy and makes it have a nice finish.