Includes 3 sizes to cover just about any rod seal installation job from 0.87 " up It is very easy to use, only two steps are needed And with the hydraulic cylinder sealing tool, you can quickly complete the installation of the seal and it doesn ' for t take a lot of effort Using a hydraulic tool helps reduce the chance of installation damage stainless steel, which is of good and and safe installing tools for flexible rod seals, Manufacturer: HENYGEN