Compatible with most wooden train toy sets (like Thomas the Tank Engine). My kids had a limited selection of 3-way connectors for their train set, so I designed this one as a recreation of a fairly standard 3-way junction.

SolidWorks file is for SW2015. STEP file is available if you can't read SW2015 files.

See my other designs for train tracks as well:

Rail Connector - http://www.thingiverse.com/thing:1779150 Flexi Track - http://www.thingiverse.com/thing:1589228 Equilateral Y Junction - http://www.thingiverse.com/thing:1576147 Cross Junction - http://www.thingiverse.com/thing:1779661