It’s no surprise the GF580 Series is one of our top sellers. You can’t go wrong finishing any of your gold-filled chains or beaded designs with these clasps. The smaller, 4x8.3mm (GF580) option is perfect for finishing smaller, more delicate pieces. Add GF583, the 6.4x14.3mm option to multi-strand chain necklaces. The oval shape is classic for a lobster claw, and easier to use than spring rings. Lobster clasps include an internal steel spring for durability and lasting wear. Because of this, be mindful when soldering near your clasp. Too much heat can cause the spring to no longer work.