My collet bushing broke so I ordered these bushings. After removing the old tensioner from the car, I found that there were no bushings left on it. When the package arrived, I got to work. Unfortunately, only one bushing fit, the other was much smaller and didn't even fit on the shaft. I needed to get it working, so I started spinning while grinding the inside diameter. I had to turn so much material that I removed the grooves intended for lubrication. For a job that should have taken me an hour at most, I needed a few.