Very cool. Are you able to leave it where it is?
I'm not sure if I'm answering this correctly but I can crank either side up or down to any level between the ground & about 48" high. Where ever you stop cranking is where the shelf rests, the brake winch holds the shelf in place, there are no pins or anything like that. The winch does the work. Oh and the shelves are not attached permanently , they clip on to the lift mechanism & can roll away when lowered to the ground.