This is for servicing and presenting locomotives with up to 8 driving axles and coupled axles. It is also suitable for the "Big Boy". Eight adjustable pairs of roller brackets with precision ball bearings are included. The design and technical construction are the same as 78100. The 78111 measurement device can be added to this roller test stand. Dimensions 520 x 42 x 30 mm / 20-1/2" x 1-5/8" x 1-3/16".