Laclede Security Chain Lock is 3 mm thick, chrome plated, heat treated case with brass lock body, brass tumblers, heated-treated brass lock cylinder and Stainless Steel spring is designed to stand up to the best efforts of lock pickers. It is impossible to insert a lever in the small space left between the lock and the chain. Works best with 3/8” square security chain. Four brass keys with nickel plating provided.
Virtually uncuttable double case hardened steel
Individually keyed: keyed alike or keyed diffferently