ITEM NAME:2pcs 1/4 Shank Woodworking Router Bit, Metric Cutter, Flush Trim Routing Bits Description: Sharp cutting smooth no burr, no edge High abrasion resistance, high-precision grinding technology, abrasion resistance 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 , carbon steel handle Body: solid hardened steel : micro grain car.Sharp cutting smooth no burr, no edge. Size: about 1/4" x 1/2" x 22mm (Shank x Radius x Cutter Length). Body: solid hardened steel. Using high-frequency welding technology, strong, durable, and long service life.