The motor is a complete drill that runs from the gfi power switch button (the drill switch is permanently on as to be controlled at the handle) and the drill has a gear coming out of it that runs a chain to the upper front of the machine that turns the first thicker black softer roller only, that roller has an adjusting smaller plastic roller that adjusts from 1/8" I'd say to 1 1/2". From there its anyones guess how the whatever material its rolling or applying goes through the other rollers. Its kind of like trying to put on a drivebelt on a car with no diagram if you catch my drift. Also, under the covered and protected drill in the back is a aluminum rack which may have held the material in question somehow or a pan or container of some kind, but there are no holes indicating permanent mounting of those theories. ALSO - THIS IS ONE HELL OF A CHALLENGE - THE POSITIVE ID AND COMPANY NAME NOW GETS YOU $20, IF THE ADMINS WISH, WE CAN MAKE THIS A SITEWIDE CHALLENGE, IM SURE AS HELL WILLING TO GIVE ANYONE A TRY, THIS IS RIDICULOUS, LOL!