Snap shackles are a common and versatile sailing tool, generally used to attach sheets, docklines, or hoisting ropes. They're strong, reliable, and easy to use. Jbird Co. has affixed one to their Jumper Lanyard, so you can securely attach your keys and gear to a belt loop and free up some pocket space. Both the shackle and the D-ring are military grade and, if you want to change your loadout without releasing it from your belt loop, there's also an attached button snap. The leather strap is full-grain and vegetable-tanned and the whole handy apparatus was handmade in Portland, Oregon.