Rix #6280003 N Scale Rail-It Rerailer Set it on the track and roll rolling stock down ramp, and it automatically places wheels on track.
The Rix Rail-it is a unique way to place cars and engines on the track. Just set the Rail-it down one a straight piece of track. Set the car on the Rail-it and roll down the ramp. The Rix Rail-it will place all the wheels on the track for you. When all the cars and engines are on the rails remove the rail-it and hang-up until needed again.