Prime Line Prod. U 9920 Sliding Door Bar
Amazon-UK: http://iboo.space/neck/2/uk/B00002N57Y/review
The Crl Security Bar Lock for Sliding Glass Doors has telescopic adjustability to accommodate 28 to 48 inch (71 to 122 centimeter) wide inside and outside patio doors.
It helps prevent forced entry through One assembly, locking saddle and installation screws per package.
