Made of steel material, through fire dipped black surface treatment,sharper,more durable. Suitable for carving, engraving, chamfering, slotting, reaming of soft materials,such as soft wood,plastic,rubber, etc. DIY woodworking polished artifact. Easy to use, safe and reliable, can reduce labor intensity, improve the working environment. Includes 5 popular shapes: Ball, Oval, Cylinder, Large Cone, Small Cone, which can process a variety of shapes of the mold cavity.