Review on Optimized Installation Mortiser Template - Ryobi A99HT3 by William Groupp

This makes installing hinges super easy, comes with a router bit and a self centering hinge bit which is all you need. It has two depth settings on the side, just set the router to the appropriate hinge size and navigate to it. I would cut in two steps, if you try to cut all the wood in one pass the router bit tends to jump around a bit.