Features: Made of 45# steel, blackened, sharper and more durable. Widely used: can handle wood, no iron metal, plastic and rubber, woodworking DIY grinding, carving, carving, hollowing, grooving, ream more→ing, 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 …