This is a twin to the one I bought off a tool truck years ago. It allows you to reach the tension-er and move it enough to get the belt off and the new one on. There are two different tension-er styles used on the Honda depending on which actual 3.5 you have. This tool will work on both. The spring style you can do fast. The hydraulic unit you just push on the wrench and let the tension-er move at it's own speed. Do not try to force it to move faster.