卸扣是吊裝施工作業中不可缺少的索具配件。卸扣可用於連接起重滑輪和固定吊索。是一種用途廣泛的輕便靈活的連接工具。鐐銬按外觀特點可分為弓形卸扣和U型卸扣。按用途分有：鏈條式卸扣、錨式卸扣、浮式卸扣。
(1) 鏈條枷鎖 is a 枷鎖 used to connect the anchor chain. When in use, the horizontal bolt should be upward, and the horizontal bolt should be round to prevent it from rotating in the bolt hole and increase its strength. When using, first take out the horizontal bolt of the 枷鎖, put the U-shaped buckle into the anchor chain ring to be connected, and then connect the horizontal bolt in series to an anchor chain ring above. In order to prevent the horizontal bolt from coming out, there is an oblique hole at each of the two ends of the horizontal bolt and the U-shaped buckle for driving the brake oblique pin. In order to prevent the oblique pin from coming out, a green lead seal should be inserted into the cavity left at the pin hole. Before the oblique pin is inserted into the pin hole, calcium-based grease should be applied to prevent rust.
(2) 錨 枷鎖 is the 枷鎖 used to connect the anchor chain and the sinker, and the method of use is the same as the chain 枷鎖.
(3) The floating 枷鎖 is the 枷鎖 used to connect the floating body and the anchor chain, and the method of use is the same as the chain 枷鎖.
