Nothing fancy here. Several years ago, I made this tri square specifically for my drill press.
I know the light colored wood is Maple but not sure about the darker one. I think it's Walnut. It's assembled with Maple dowels.
It's pretty accurate when I hold it next to my machinist square which is dead accurate. In the first photo I'm holding them up in front of florescent lights. No gaps at all.  Cold and hot weather hasn't changed it a bit which surprised me some. I was thinking over time it would change sitting in my garage cabinets but it hasn't.

 

 

Thanks for looking! 
Cheers! 
MrRick 

Edited January 13Jan 13 by MrRick

Very cool!

Thanks lew!