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Continue to ChatKP2-FSB-19.1-RE-1 - 4NC/2NC, Brass, Bolt length 19.1mm, Rear Entry, Castell KP Bolt Interlock With Safety Switch https://www.concretespares.ie/product/kp2-fsb-19-1-re-1-4nc-2nc-brass-bolt-length-19-1mm-rear-entry-castell-kp-bolt-interlock-with-safety-switch/