Bosch 2-11/16-in Carbide-Tipped Lock Miter Router Bit in the Cabinetry & Joinery Router Bits department at Lowes.com
Yonico Lock Miter up to 1/2 in. Stock 1/4 in. Shank Carbide Tipped Router Bit 15129q - The Home Depot
45 Degree Lock Miter Router Bit – FindBuyTool
Amazon.com: Rockler Router Jig – 45 Degree Lock Miter Bit – 3/8” to 3/4” Thickness – Sharpened, Anti-Stick Woodworking Miter Router Bit – 1-3/4" D x 3/4" H x 1/2" Shank Lock