This ogee bit creates a wavy profile on your workpiece with an inset bead on the top. Equipped with a bearing for easy template work, this bit features super-strength superior steel body, Non-Stick Orange Shield Coating and cutting edges made of SinterHip Hi-Density Industrial Chrome Carbide for a long-lasting performance. After a test performed by Wood Magazine, CMT orange bits have been rated the first overall router bits compared to other brands. From the Manufacturer Series 846 bits can be converted to series 847 bits by changing the bearing to 3/8. Important: always assemble the black bearing heat shield with the raised side up when changing the bearing. Improper assembly will cause the screw to come loose and the bearing to fall when working.