5), and were very light, but they seemed only moderately supportive and looked different when I had them on vs. Or the base not rounded, otherwise it works. Battery lasts about 6 hours per charge soo binge-watchers take note. Strictly speaking, the installation does not require drilling. It took me around 25min and I only had to ask for hubby help when I had to put the top bar on (short girl problems)Im very happy with my rack and highly recommend it! I needed a way to get rid of the obnoxious and overflowing spice rack I had that took up the entire right side of the first shelf. I decided to just try them out (ordered a size 8. As soon as I received the product, I tried it on and it was perfect for my body size! Worth mentioning though in case you are AAA battery deprived cuz you will need the remote. Unfortunately, the ball loops around and into the basketball hoop when you hit it-if you?ve got a net on the hoop it?s a tangled mess.