These HO scale Kadee/Vulcan double truss fully sprung metal trucks come with Whisker(R) Couplers. They feature Code 110 (.110 wide) 33 ribbed - back RP - 25 wheels. Mount them with a #2 or 2 - 56 screw. The Vulcan truck, introduced in the 1920s, replaced the Archbar truck. Its pin - held journal box allows for quick replacement. This truck was used until the end of the steam era on mainline railroads and longer on some specialized equipment. Key features include ready - to - mount metal Whisker® Couplers, accurate markings, incredible prototype - true detail, non - magnetic metal wheels, highly flexible sprung trucks, metal side frames and a fully sprung bolster, and smooth - tracking free - rolling contoured insulated axles.

Using these trucks is easy. First, you can mount them with a #2 or 2 - 56 screw. They are ready - to - mount with the included metal Whisker® Couplers, so you don't have to do much extra work. When using, make sure to place them on the right kind of equipment suitable for HO scale. As for maintenance, keep them clean. You can use a soft brush to remove dust. Check the wheels and axles regularly to ensure they roll smoothly. If the journal box needs replacement, just remove the pin to swap it out. Also, store them in a dry place to prevent the metal parts from rusting.