The AndyMark #25 Inline Chain Tensioner is designed to adjust the tension in long runs of #25 series roller chain, making it suitable for mechanisms such as elevators and arms. It is particularly effective in scenarios where a section of chain, approximately 3 inches, does not pass over a sprocket. This tensioner is inspired by Misumi's Chain Turnbuckles and has been enhanced for compatibility with imperial-sized wrenches.