Kreg 3/8-Inch x 1-1/2-Inch Notching Bit - Single Pass Wood Notching Router Bit - PRS4210
This 3/8" Notching Bit is used for creating 3/8"-deep notches for all 5/16" and 3/8" beading profiles.
Provides one-pass operation for cutting a notch for 11/2"-wide rails.