Kathy store INC Centering Pin Spring TwistLock Centering-Pin Springs attach Excellent Quality. Superior to stick-pin holders. Material: 304# High Carbon Steel ; Color: Silver Size Length:15 mm X 5 mm (LXW) ; Weight: 0.07g stainless steel TwistLock Centering-Pin Springs attach to hook eyes that permanently Package Quantity: 20 Pack / 50 Pack select