This was a project that i made on a sunday afternoon. I made this because i didnt feel like purchasing a 50 dollar camera dolly. All the parts are 3d printed exept for the bolts required to assemble it. the list is as follows-1/4 20 bolt 3/4 in long x10you will also need to purchase a pack of bearings with the following specs - 1/2 in ID, 5/16 in WIDTHEnjoy the biuld and let me know how it works! i Still use the one i made and its been working well for 3 months now!