593-43731PC Features: -Ball bearing pilot.-Extra-smooth trimming bit.-Straight, double flute with boring point and pilot.-For smooth cuts and even feed rates without chatter.-For trimming high-pressure plastic laminate or Corian flush with substrate.-For trimming high-pressure plastic laminate countertop edges where a bevel is required.-For mortising of doors to accept hinge butts.-Cutting Edge Material: Carbide-Tipped.-Quantity: 1 per pack. Dimensions: -For 3", 3 1/2", and 4" hinges.