The wrench allows you to accurately use proper torque to butt and remove all kinds of coaxial joints, so as to avoid damage or even separation of coaxial joints due to excessive torque. It also provides all kinds of coaxial joints and all levels of torque for your choice The torque value has been preset in the wrench. When you use the wrench to rotate the coaxial joint, when the rotating torque is about to reach the preset torque value of the wrench, the wrench will produce the brake effect and can no longer rotate.