LEATBUY 1/4-Inch Shank Tongue and Groove Flooring Router Bit Set 2 PCS,V-Notch Wainscotting and Flooring Matched Router Bits Set with Edge Banding(1/4-Bevel) - - Amazon.com
KATANA Tongue and Groove Set Details
Tongue and Groove Router Bit Tool Set, SellyOak 1/2 Shank Tongue&Grooving Router Bits + 1/2 Shank 45° Lock Miter Router Bit, Wood Milling Cutter Woodworking Tools on Router Table/Base Router etc. - - Amazon.com
Bosch 1-7/8-in Carbide-Tipped Tongue and Groove Router Bit in the Cabinetry & Joinery Router Bits department at Lowes.com