RK Super Safety's - no more interference with trap jaws, tangled messes, or lost animals due to the safety accidentally flopping onto the trap spring - they stay in place for ease and safety! These excellent safeties are easily installed with a bench vise or a pair of vice grip pliers. Once you see how much time and fur they save, you'll wonder how you ever trapped without them. For 330's and 280's. These are universal parts.