M8 Rod holder

I have changed the model so it can perfectly hold an m8 rod or any thing in the m8 range.I have scaled it down too because i used it as a holder for my filament spools.There is also a stopper that you can print with TPU to make it less slippery.The dimensions for the place where you put the rod are so that you can screw it onto the rod to have more stability and it doesnt falls down if you pick it up by the rod.