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
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Whiteside Router Bits 2306 Chamfer Bit with 45-Degree 1-1/16-Inch Cutting Length - Router Bits - Amazon.com
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45 Degree HW Insert Router Bit for Engraving #W170.210.R