Used these to attach a 9 foot decorative windmill to concrete poles which I cast to prevent the windmill from being blown away in high winds. So far, so good. I only wish they were sold individually.
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πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
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POWERTEC 4 Inch 20 2 Inch QTB1005 T Slot: A Revolutionary, High-Quality Power Tool Accessory!
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