Slot cutter with arbor and bearing for making splines, biscuits, T-molding and more. Carbide tipped cutting edges, anti-kickback design to help you control the depth of cut and PTFE coating to protect the tool from resin buildup and pitch. Arbor is specially ground from special high-strength steel and precision ground in all critical areas. CMT orange bits have been rated the #1 overall router bits compared to other brands (Wood Magazine).