Whiteside 45 Degree Lock Miter Bit
Wedge shaped tongue and groove joints are a little simpler to make than the straight variety which requires a near perfect match to make a strong joint.
This particular Whiteside brand set is designed for material from 5/8” to 1-1/4” thick. Both cutters are 1/2" shank. These bits do not have a ball bearing and as such should be used with a simple split fence on a router table. (The Woodpecker LE Fence is well suited for this application.