Are your sliding doors and windows fully safe and secure? This pack of ten window locks for vertical sliding windows and horizontal sliding doors and windows simply screws on to the existing tracks. The fully adjustable design means you can simply move the sliding window lock along the track for a fully secure door/window or one that opens partially for ventilation. These window clip locks are perfect for upper level windows and balcony doors where safety is a concern. These childproof window clamps will make any sliding window or door safer while still allowing ventilation. Stop worrying about the safety of your loved ones with these sliding door track locks. These also provide additional security to vulnerable sliding doors and windows. These locks grip incredibly firmly making it impossible to force entry through forcing sliding mechanisms. This is perfect if you need extra security and are away from your home for long periods. Our high quality sliding window security locks are made of heavy duty aluminium for maximum strength. High specification thumb screws give a tighter hold that can easily be adjusted. Unlike many other products on the market our design has fixed thumb screws meaning they can be easily adjusted and in the event of emergency they won t cause a barrier to exit the home or building. Locks are 2 wide and the flexible clamp fits tracks 3/16 inches wide or 3/8 inches with rubber cushioning removed so you can be sure it will fit a large range of doors and windows.