Cut perfect grooves & rabbets without a dado set | Wood
YONICO Tongue and Groove Router Bits Set Up to 3/4-Inch Stock 1/2" Cutting Depth 2 Bit Set 1/4-Inch Shank for Edge-to-Edge Hardwood Flooring, Paneling, Cabinet Door, Plywood Sheathing 15221q - Amazon.com
Rockler Cutting Board Juice Groove Routing Jig
DIY Cutting board juice groove jig — Walker's Woodworks