Description: Sharp blade cutting smooth no burr, no edge High abrasion resistance, high-precision grinding technology, superior abrasion resistance Unique head design, 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't operation. Applicable for electric trimmer, engraving and milling machine, CNC engraving machine, CNC machining centers and other machine tools Specification: Material: alloy blade, carbon steel handle Body: solid hardened steel Blade: micro grain carbide Bearing: totally enclosed & lubricated Type: rounded corners Shank Diameter: 1/4'' Size: about 1/4'' x 38.1mm (Shank x Radius) L(Total Length): about 56mm Package Includes: 1 Piece Radius Round Over Router Bit Note: Please allow 1-2mm error due to hand test