Whiteside Wedge Tongue and Groove
When compared to gluing two flat edges together, a properly fitting tongue and groove joint is stronger because of the increased surface area for glue.
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.)
Made in the U.S.A.