The Crank and Stein offers quality construction, reasonable price, and the fact that it is made here in the USA by skilled craftspeople. 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. The base is hand crafted of cabinet grade hardwood plywood and the hopper is a 2 gallon galvanized steel funnel that will give years of rust free service. If you plan to drive this mill with a power drill you can order it without the optional hand crank from the option menu above. Some assembly required.