Description: Sharp cutting smooth no burr, no edges High abrasion resistance, high-precision grinding technology, abrasion resistance Unique , chip removal more smoothly The Stacked Rail and Stile Router Bit will cut both rail and stile in a cove design. Using high-frequency welding technology, strong, durable, and long service life Purposes for wood, acrylic material edge processing, metal materials can& 39;t operation. Applicable for electric trimmer, engraving and milling machine, CNC engraving machine, CNC machining centers and other machine tools Specification: Material: alloy , carbon steel handle Body: solid hardened steel : micro grain carbide Bearing: totally enclosed & lubricated Type: rounded corners Size: about 1/4& 39;& 39; x 1/4& 39;& 39; (Shank x Radius) D (Diameter): about 15.35mm R(Radius): about 3.17mm B(Width): about 3.17mm H(Thickness): about 7mm L(Total Length): about 52mm Package Includes: 1 Piece Radius Round Over Router Bit