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Continue to ChatKL-QB-3S-12.7-3-D - Brass, Retracted Bolt length 12.7mm, 4 Locks, Double Key, Castell, Q Type, KL Dual Key Bolt Interlock https://www.concretespares.ie/product/kl-qb-3s-12-7-3-d-brass-retracted-bolt-length-12-7mm-4-locks-double-key-castell-q-type-kl-dual-key-bolt-interlock/