250-ton steam crane and boom tender includes blackened machined-metal wheels with RP25 contours. It is magnetically operated, body mounted E-Z Mate couplers. Non-magnetic, blackened brass axles with needlepoint bearings. Celcon trucks added weight for optimum tracking.Features include: ?Blackened machined-metal wheels with RP25 contours?Magnetically operated, body mounted E-Z Mate couplers?Non-magnetic, blackened brass axles with needlepoint bearings?Celcon trucks?Added weight for optimum tracking