Comstock wire triggers have been redesigned for much easier installation! The new style of trigger wires simply hook on to the swing bar rather than being fed through it. This new style is safer for animals and also reduces the amount of trigger wires damaged by trapped animals. Replacement trigger wire for all Comstock Series 12″ x 12″ traps. Package of two, six, or twelve. This part is made from 14 gauge spring wire.