Yonico Louvre Slat 1-1/4 in. L 1/2 in. Shank Carbide Tipped Router Bit 18153 - The Home Depot
Shutter Bead Router Bit w/Shank – Router Bit for Custom Shutters – Edge Forming Router Bits for Doors, and More – K10 and K20 Grade Carbide Cutter Router for Clean Cutting Action - -
Making plantation shutters
Louver Shutter Style Router Bit Durable 1/2" Shank Door Woodworking Tenon Cutter | eBay