Knife Sheathes, BCD Cummerbunds, Non-Dump-Able Weight Pockets, most use Quick Release Buckles. Having some spares in your Save-A-Dive-Kit can make the difference between a great dive and an aborted dive because of equipment problems. Squeeze-Style" Quick Release Buckle is made from Impact Resistant Non-Corrosive Plastic. Always have spares on hand. Buckle measures 1.5" (3.8 cm) and is perfect for Knife Sheaths and Weight Pockets.