Review on Upgraded Heavy Duty Rear Bicycle Stabilizers Kit with Stronger Version Training Wheels for Boys and Girls - Fits 12, 14, 16, 18, and 20 Inch Bikes by Marcus Hargrave

We were glad to get these as they had great reviews for our boys bikes that didn't come with training wheels. I installed them, which was mostly easy. The hardest part was attaching the wheels. This required a separate key in addition to the key sent in the package. After installation my kids started using them and within minutes one of the slats fell off. So I reinstalled it harder than I thought it needed, but now it's left. However, the wheels themselves fall off every time we use them. At least one wheel per bike tour comes off and has to be reassembled. I would not buy this product again. There weren't even instructions on the box. The wheels literally fall off. I would like to return them but they have been used.