This is a replacement drive shaft to fit an N Scale Atlas 4-4-0.
The kit includes two drive shafts and two drive shaft sockets.
The hole in the sockets for the metal drive shafts will need to be drilled out with a 1.6mm Ø Drill.
The kit is available here.
The kit is designed to be printed in the Shapeways FUD material and it will require cleaning upon delivery, please see my FAQs for more information.