Ingersoll London Line Hookbolt; insurance approved to BS 3621 : 2004. 20mm single throw, drill resistant Hook Bolt. Drill and tamperproof case, supplied with Mul-T-lock Interactive Euro profile double cylinder, can be keyed alike with London Line nightlatch SC100; long plate security escutcheons to mask old preparations. anti jemmy attack,boxed locking plate,available in brass or chrome finish.

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