CMT 855.801.11 Window sash router bit sets 1-1/2-Inch, Diameter, 1-3/8-Inch Cutting Length For making beautiful wooden windows Use on router tables only Produce perfectly matched 1-3/8 rail and stile parts for custom made interior doors Non-Stick Orange Shield Coating, Anti-Kickback Design, Equipped with Bearing 2 SinterHip Hi-Density Industrial Chrome Carbide cutting edges for long-lasting performance