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One way lag screw, when installed cannot be removed by conventional tools providing security from someone trying to take it apart. Lag Screws are used for directly fastening into wood surfaces. They are used with a lag shield and lag screws can be used in masonry applications.
From the Manufacturer
One way lag screw, when installed cannot be removed by conventional tools providing security from someone trying to take it apart. Lag Screws are used for directly fastening into wood surfaces. They are used with a lag shield, and lag screws can be used in masonry applications.
David Fox
June 20, 2025
These work great and I was able to put up my security windows and door that I got second hand.
Donald Trapp
May 6, 2025
Work and feel very heavy. Have not tried backing one out or trying. Hopefully they the bolts will stay put now.
SuperCurry
February 4, 2025
Replaced security bars with these screws. Perfect fit and good a good price.
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