This is an HO scale jig that allows for correct alignment, sizing and positioning of the sills, posts and caps of a tall double track trestle bent.
The jig comes with complete instructions on how to use it with measurements and requirements for scale lumber to build. Note: Scale lumber not included.
The jig is for using water soluble glues only. (Wood glue or Elmer's). It is not for building of plastic or styrene models as the jig is made of plastic and any CA or epoxy type glue will bond with the jig.