DEROFIT Window Security Bar 2Pack, 16 to 51Inch Adjustable Sliding Door Lock Bar- Dual Use-Patio Sliding Door Security Bar or Window Security Lock, Child Proof Window Security Bars Window Stopper

good product

Buena calidad y muy funcionales

Very easy to assemble and install. Took me less than ten minutes for two windows. The security bars fit nicely to the sides of the windows, so they’re hidden from view. Bought another set and will buy more for all my windows in the near future. Overall, these are an affordable and convenient layer of home security.

These window security bars work exactly as promised. Once installed, no one can slide the windows open from the outside — the only way would be breaking the glass. They fit perfectly and feel very sturdy. The adjustable length makes them easy to place on different windows, and they stay firmly in position without slipping. They give us a lot more peace of mind, especially at night.

A great safety purchase. I live downstairs and a large window faces close to the street. I need fresh air and this fits the bill. Very sturdy and easy to adjust length. One is used for a window and one for a sliding door in my bedroom. Feel very safe while sleeping.

I used it for windows that open upwards in an area that faces an alley. It was easy to put together and maneuver into place. They seem really solid and strong. Worth it for a bit more security,