I used a plywood deck to prototype this device. MFRshooter heavily influenced this design. I used ansi # 25 chain and sprockets, my skateboard wheels are 2.55 inches tall and I glued stainless steel shaft collars into the wheels on each side. The holes in the wheels are for the Allen key to reach the set screw. I also have a programmed power switch for 1,2,4 or 8 hours.
The Klein Tools 6 in 1 nut driver has 3/16, 1/4, 5/16, 3/8, 7/16 and 9/16 sizes on one tool.
It has a cushioned handle and a heavy duty shaft and a wrench assist collar to break free froze nuts and bolts.
We have more tips in our home improvement book https://amzn.com/B01MRGO8C5