LAL570EXTKIT - Security Plug Extension Kit CategoriesDoor CylindersLAL570EXTKIT - Security Plug Extension Kit LAL570EXTKIT - Security Plug Extension Kit Out of Stock. Contact us for availability. Security Plug Extension Kit for 50mm cylinder $11.50 Brass plug extensionUse your 6 pin security plug into a 50mm cylinderComes with 2 extended length screws ×Close Nothing to see here!