Windows and doors that slide open are a favorite entry point for criminals. They open & close silently and factory-installed locks & latches are often easy to defeat. This simple and reliable lock grabs onto window ...

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Windows and doors that slide open are a favorite entry point for criminals. They open & close silently and factory-installed locks & latches are often easy to defeat. This simple and reliable lock grabs onto window or door track and prevents further opening. Also lets you set maximum window-opening size - a great way to safeguard upper-level windows for children.


  • Instantly lock sliding windows and doors - no drilling or tools needed
  • Place on window or door track to lock shut or allow partial-opening then just tighten thumb screw
  • Prevents window from being forced or pried open from outside; easy removal and reusable
  • Fits most vertical or horizontal sliding windows & many sliding doors to 1/4" maximum track-width

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