Defender Security U 10309 Swing Bar Lock for Hinged in Doors Secondary Door and Home Security, 3 7/8 Length, Diecast Zinc Construction with a Classic Bronze Finish

SECURITY LOCK – This swing bar lock is a security locking device for hinged swing-in doors, allowing a door to be slightly opened to allow safe viewing and ventilation CHILD-SAFE SECURITY DEVICE – This swing bar door lock can also be installed out of reach of children so they cannot open the door by themselves, providing additional child-safe door security EASY INSTALLATION - Adding a security swing latch to your door is quick and easy; all installation fasteners, including 2 plastic 1/8 shim spacers for offset door jambs STRONG AND DURABLE – Constructed of zinc diecast with a classic bronze finish, the security door lock is strong, durable, and sure to last DIMENSIONS - This locking bar is 3-7/8 inch bar length x 2-1/2 inch height and has a long, hinged bar, which folds over the closed door to engage the catch; for further dimensional information, please see the line drawing, Weight: 0.46 pounds, Manufacturer: Prime-Line Products (Home Improvement)