Superior protection for medium/high crime areas with advanced features. Chains made from titanium-reinforced, hardened steel links that resist cutting and prying. Chain cover protects paint and features an embroidered logo that won’t flake or wear off. Z-cylinder tumbler mechanism is bump-proof and resists picking, pulling, and drilling. Co-molded crossbar cover protects finishes; all-metal endcaps guard against hits and drops. Automatic keyway cover seals lock internals from the elements. Includes 5 laser-cut keys, one with a micro-LED. Attributes Internal Lock Size Imperial 4.3' Internal Lock Size Metric 110x10mm Lock Type Key Primary Color Black Thickness In mm 10mm