NMRA Gage, O Scale (84532)

NMRA Gage Assures Trouble Free Operation of Your Model Railroad

This gauge helps you to make adjustments to rolling stock and track to end annoying derailments. It will check for accurate track and switch dimensions, wheel spacing, flange depth, tire width and wobble, and more. This is a precision measuring instrument manufactured of stainless steel by the National Model Railroad Association. Instructions included.