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Continue to ChatKSP-QS-12.7-4 - Stainless Steel, Retracted Bolt Length 12.7mm, Q Type, Castell KSP Spring Bolt Interlock https://www.concretespares.ie/product/ksp-qs-12-7-4-stainless-steel-retracted-bolt-length-12-7mm-q-type-castell-ksp-spring-bolt-interlock/