Great clamps! Put outdoor lighting poles around outdoor dining room. Was able to buy 2 inexpensive poles for the back, slide the poles through the clamps and clamp them to the top rail of my fence to stabilize the poles. Bought 2 heavy duty poles with auger drill bottoms for the front due to need for stability. These clamps saved me a ton of money by using them with the weaker, cheaper poles next to the fence! Love them!!!