4 Sets Sliding Window Locks, Window Stoppers for Vertical & Horizontal Slide Door, Adjustable Security Locks for Patio YELLOW

【Double Screw & Rubber Pad Design Window Lock】: Sliding window lock security is mounted on the sliding window/door track with double screws to prevent sliding and increase security. Simply tighten them to fully secure windows/doors or allow ventilation, no additional tools required. Equipped with rubber bumpers to prevent scratches or damage to the window and increase the safety of the window.

【Easy to Install Portable Window Lock】: This window is locked with a key, 4-step quick installation. No tools or drilling required. Use double hole locks on heavy windows/doors for added security. The locks are 2.4" long and can be fitted with rails up to 0.4" wide (with rubber bumpers) or 0.67" wide without rubber bumpers. Please measure your trajectory before purchasing.

【High Quality Material】: The window safety lock is made of high quality aluminum alloy, with exquisite workmanship, anti-rust, anti-aging and durable. The yellow plastic cover on the outside of the handle of the key is made of ABS material to prevent the aging of the key handle.

【Wide Application】: This sliding window plug lock for home, office, children's room, kindergarten, elementary school, you can keep the window partially open or closed to avoid the hidden danger of children and pets climbing the window. Also, it prevents thieves from getting in.