3Pack Home Security Swing Bar Door Lock Latch for Hinged Swing-in Doors - Secondary Security Door Latch Guard Clasp for Kids Home Hotel Apartment, Hotel Door Latches, Thicken Solid Zinc Alloy, Silver :
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HOJLKLD Door Lock Latch for Home Security, Swing Bar Door Guard, Front Door Locks Secondary Security Door Latch for Kids Home Hotel Apartment (Black) : Amazon.co.uk: DIY & Tools
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Defender Security U 9900 Swing Bar Lock for Hinged Swing-in Doors – Secondary Security Lock for Door and Home Security, 3-7/8” Bar Length, Diecast Zinc Construction with a Chrome Finish : Amazon.co.uk:
Heavy Duty Home Security Door Lock,Hotel Door Latches,Swing Bar Lock – Secondary Security Lock for Door and Home Hotel Office Security(Gold,Length:3.9inch) : Amazon.co.uk: DIY & Tools
Instead of a door chain or door bar, my hotel had this as a secondary locking mechanism. : r/mildlyinteresting
