4 Pieces Adjustable Sliding Double Window Locks Stops Aluminum Alloy Door Frame Security Lock with Keys (4 Pcs Double Lock)

Improved Double Glazed Locks - Double glazed locks can be applied to heavy doors or windows for added security. And it will be more solid, solid and sturdy, exquisite workmanship, aluminum alloy frame and stainless steel screws that can be reused many times Quantity and size - double sliding window locks with 4 keys; approximate volume 6 x 2.54 x 2.4cm / 2.36 x 0.95 x 0.95inch (LWH), apply to track heights above 1.2cm / 0.47inch, thickness of the non-superior route at 1.6 cm / 0.63 inch (not applicable to middle lane) window, please check your window track before purchasing) Easy to install - no need to install any additional tools, it has a hex key in each window lock, held by a keyed control on the track. Designed for horizontal/vertical windows and sliding glass doors; Not for plastic window frames Wide use - can be easily applied to most environments; By keeping the windows partially open and closed, the burglars and thieves can prevent children from falling and protect the safety