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 Miter Router Bit : Industrial & Scientific - Amazon.com
45° Lock Miter Router Bit, Whiteside Machine Company