Hello I am Micheal Daniels welcome to my website. I just want to give you some information about my new style of polished rod clamp that I invented and have a patent for. The clamp is operator-friendly and has a tighten nut for safety ,so that when it is tightened the nut will not back off. The clamp is easy to remove and install. The clamp has been "pull tested" for 40 ton which is 81,600 pounds. The clamp has been certified and has been tested for 28 tons which is 56,100 pounds. It does not scar or damage the polished rod. I have tested the clamp on various wells  which are rotaflex and convention units. The clamp is ready to go the field and get to work. If any questions contact  gregoryshelton546@yahoo.com or miked84001@hotmail.com and follow us on Instagram daniels_universal_poished_clamp