Trigger Catch 12mm Gun Metal. 12mm trigger catch in Gun Metal. Also know as a lobster or claw clasp. Length 12mm. Here at Jillybeads we understand that some beaders can be a bit reluctant to buy online so if that is you, give us a call as we are always more than willing to take your order over the phone, or even add an addition onto your existing order. We like to make your shopping experience as simple and easy as possible!