T-Slot Cutter Router Bit for 1/4" Hex Bolt - Yonico 14190q
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
5/32" x 1/2" Top Bearing Slot Cutter Router Bit - 1/4" Shank - Yonico 14913q - Walmart.com
55500 E-Z Dial Slot Cutter 4 Wing x 2-1/8 Dia x 1/8-1/4 x 1/2 Inch Shank