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Continue to ChatKSP-QS-6.4-4 - Stainless Steel, Retracted Bolt Length 6.4mm, Q Type, Castell KSP Spring Bolt Interlock https://www.pneutrol.com/industrialspares/product/ksp-qs-6-4-4-stainless-steel-retracted-bolt-length-6-4mm-q-type-castell-ksp-spring-bolt-interlock/