What Is a Jewelry Trigger Clasp?

A jewelry trigger clasp, also known as a lobster clasp for its resemblance to a lobster's claw, is a common element used to close necklaces or bracelets.

Sizes

Jewelry trigger clasps are labeled in "width by height" measurements because of their rectangular shape. The widths range from 7mm to 28mm; height is usually between 4mm and 8mm.

Metal Finishes

Trigger clasps are available in gold, silver and copper as well as plated metals, such as pewter, bronze, and gold- or silver-filled, to coordinate with jewelry designs.

Mechanism

Trigger clasps operate by pulling back a curved nub, shaped like a gun trigger, with the thumbnail, which in turn moves a piece of metal covering the opening on the clasp. A spring inside snaps the opening closed when the trigger is released.

Companion Ring

A jewelry trigger clasp is commonly used with a jump ring on the opposite end of the necklace or bracelet to form the closure. The jump ring should be large enough that the hook on the trigger clasp catches it easily.

Attaching

Jewelry makers use small jump rings that slide through the soldered loop at the base of the clasp to attach them to jewelry. They also may be attached by adding them to a loop made with the stringing wire that is secured with crimp beads.

References

• "30 Minute Beading"; Katie Hacker; 2005
• FIremountainGems.com: A Selection of Lobster Clasps
• FixItClub.com: Common Jewelry Repairs

Resources

• ManaBeads.com: Using Crimp Beads to Attach a Clasp
• Bloglander.com: Attaching a Lobster Clasp to a Chain
• HandmadeJewelryMaking.Wordpress.com: Attaching a Lobster Clasp to Nylon Cord