I was so happy to receive the package, it wasn't well packaged but the bits were just what I needed. I chose this item because it had a clip to attach the racquet to one spot. Unfortunately it didn't hold up to the 2x4s I cut so I had to create a workaround using C-clips. I did my job but the ball bearings kept unscrewing from the base. it can cause injury and it can happen on 3 wheels out of 4. Great idea but unfinished.