Improve performance of longer HO equipment on 22′ or larger radius curves with this easy to install conversion. Parts match the extended drawbar included with current production WalthersProto passenger cars, and easily fit Walthers (932-) or earlier WalthersProto (920-series) models. Set includes enough drawbars to refit 10 cars. Accepts Proto MAX and similar types of knuckle couplers, each sold separately.