Features: brand new and high quality Made of high-quality tungsten steel alloy materials, practical and durable. Shank diameter is 12mm. This for extra large thumbnail router bit will add a classic design to the edge of any table. You can also use the thumbnail bit to create beautiful plaques, frames and crown moldings for cabinets. Two flute carbide cutters with ball bearing guide. Suitable for using on table mount and handheld router. Give perfectly smooth well-proportioned curves to dining and coffee table edges. Specifications: Material: Tungsten Steel Alloy Shank Diameter: approx 12mm/0.47 inches Note: 1.Please allow 1-3cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Router Bit