Yonico Slot Cutter 1/4 in. Shank Carbide Tipped Router Bit Set (4-Piece) 14481q - The Home Depot
T Slot Router Bit 1/4" Shank 5/32" Cutting Depth 2 Flutes Hss Cutter Grooving - Walmart.com
Yakamoz 1/4 Inch Shank 3-Wing Adjustable Slot Cutter Router Bit Set with Bearings | 6-Picecs Slotting Cutting Blades, 1/2 Inch Cutting Depth, 6 Different Cutting Widths - Amazon.com