Designed to replace old metal couplers on 2 axle and freight cars from Piko and others with a standard NEM socket. Allows for use of close couplers for prototypical distances between cars. Reuses stock mounting points and existing spring clip.
The length of the adapter is set to NEM standard (couple point near end of buffers).
For most cars the narrow version should work fine, the wide version is only for cars with extra wide support beam (metal support that the adapter rests on), using this version on cars with narrow support beam will position the coupler too low.
Due to difficult position of the spring mount hole, I found it easier to feed the spring through the hole from the top instead of trying to clip it onto the hole from below.
For 4 axle passenger cars, cars with brake booths and any other cars requiring longer coupler length, try the medium size adapter
or long adapter