Closure Options Closure Options There’s a wide variety of closure options for all bracelets. Shackle Closures Shackle closures are basic, simple, and tough. An extender lets you fine-tune the fit. We offer brass, silver, and black anodized options. Different bracelets come in different widths. These are the closure sizes we use. A variety of closure options are available. L.E.D. buckle L.E.D. buckle Mad Max style closure Para-claw buckle Standard survival buckle Handcuff key buckle Survival buckle v2.0