Feature: 1. Made of 45# steel, blackened, sharper and more High quality. 2. Widely used: can handle wood, no iron metal, plastic and rubber, woodworking DIY grinding, carving, carving, hollowing, grooving, reaming, etc. 3. Easy to use, safe and reliable, can reduce labor intensity, improve the working environment. 4. Universal round handle, clamping firm, the machine must be able to clamp 6.3mm to use. Specification: Features: Made of 45# steel, blackened, sharper and more High quality. Widely used: can handle wood, no iron metal, plastic and rubber, woodworking DIY grinding, carving, carving, hollowing, grooving, reaming, etc. Easy to use, safe and reliable, can reduce labor intensity, improve the working environment. Universal round handle, clamping firm, the machine must be able to clamp 6.3mm to use. Specifications: Material: 45# Carbon Steel Color: Black Total Length: Approx. 58mm Top diameter: Approx. 12mm Top length: Approx. 25mm Shank Length: Approx. 29mm Shank Diameter: Approx. 1/4 " (6.3mm) Maximum RPM: 20,000 Packing weight: 230g Package size: 130mm*100mm*18mm Notes: Please allow 1-3cm measuring deviation due to manual measurement. Package List: 1 * Rotary Burr Set (10Pcs/ Set) Package List: 1 * Rotary Burr Set (10Pcs/ Set)