This "T" shaped tool was designed to make opening and closing the push-and-twist closure latches on Subal housings much easier. If your thumbs are not strong enough or are just plain tired after diving, then getting these latches to open or close is a challenge. It is shaped to fit onto the latch knob securely and make pressing and twisting a snap! Will work on both left and right side latches. Made from durable Red ABS plastic to last and be easily found. Check out our video to see how it works.