Long Service Life--Our square pipe clamp made of high quality metal materials and surface fully covered black powder coating, rustproof and durable, provide reliable, sturdy support for a long time, use with indoor and outdoor. Suitable size can be selected according to the needs of the sceneOur Product--8 Pcs square tube strap clamps. Inner size:1-1/2" x 1-1/2" inches, thickness 2 mmWide Application--If you have a post that is falling off, our square tube buckle are suitable for fence repairs or new installations, such as water pipes, balcony and staircase railing posts, pool fence or other wood members etcNot Easy to Slip--The U-Shaped pipe clamp bracket can lock the tube very firmly and prevent them from twisting and sliding, which is convenient to use. Each square tube strap clamps with two kinds of pre-punched holes, diameter :diameter:5.2mm; 7.4mmEasy to Install--Black square pipe strap clamp can be instalquickly, simply place it where it needs to be secured, then mark the holes and lock it in place with screws. (NOTE: Screw not included)