OnGuard Mastiff Lock

Mastiff series chain locks provide superior protection for medium/high crime areas and are packed with features

• Chains made of titanium-reinforced, hardened steel links that resist cutting or prying

• Chain cover protects paint and finishes, with an embroidered logo that won’t flake or wear off

• Locking mechanisms secure the lock at multiple points: X4P Quattro Bolt shackles on models with separate shackle; X2P Double Bolt on models with integrated locking heads.

• Locks use Z-cylinder tumbler mechanism that is bump-proof and resists picking, pulling, or drilling

• Co-molded crossbar cover protects finishes and all-metal endcaps provide protection against hits and drops

• Automatic keyway cover helps seal lock internals against the elements

• 5 laser-cut keys, 1 with micro-LED