Onguard 45008017LPT Dimensions: length: 4.5'; 12mm gauge links; 16mm T-rod diameter; 7.7 lbs.Chain made of titanium-reinforced, hardened steel hexagonal links that resist cutting or pryingChain cover protects paint and finishes, with an embroidered logo that won’t flake or wear offX2P Dual Lock mechanism that secure the shackle on four or two sides, respectively.Locks use Z-cylinder tumbler mechanism that is bump-proof and resists picking, pulling, or drillingCo-molded crossbar cover protects finishes and all-metal end-caps provide protection against hits and dropsAutomatic keyway cover helps seal lock internals against the elements5 laser-cut keys, 1 with micro-LED