This is just the mill head as shown in the picture. To operate the mill you will need to mount it on a base and add your own hopper. The mill features dual eccentric stainless steel bearing adjusters are connected with a crossbar and held in place by set screws. Factory preset .045" Adjustment ranges from .010" to .080" Two rollers 5" long, 1.5" diameter, cold rolled steel, diamond knurled pattern w/grain-engaged gear teeth at ends Aluminum frames, SAE-841 bronze bearings, eight 1/4"-20 mounting holes for sturdy versatile setup, bolts included. Tool-steel driveshaft 3/8" diameter with 3 flats for positive drill chuck attachment. Precisely sized, trued and polished axles spin freely with minimal wear.