Peco O-16.5 OR-22 4 Wheel 2-ton Bolster Wagon kit

A basic flat wagon fitted with a securing bolster.
Bolster wagons were usually used in pairs, allowing long loads including tree trucks and cut timber to be carried between two wagons. Frequently the wagons would be positioned at each end with the load securely chained to the rotating bolsters acting as the only connection between them.

This short bolster wagon, the longer flat wagon or the skip wagon frame can also be used as bogies for long coaches or wagons.