1、EXCELLENT METAL: Made of excellent molybdenum steel, the surface quenching process increases the hardness of the object and is not easy to deform. 2、STABLE STRUCTURE: Double side constraint of double side key, not suitable to shake left and right during heavy cutting to ensure the rigidity and comfort of machining. 3、SCREW LOCKING: The chuck holder is locked with screws to ensure accurate and stable operation, with large chip removal space and high working efficiency. 4、GOOD PERFORMANCE: Completely carburized and heat treated, internal and external diameter grinding, the chuck holder has high heat strength and oxygen resistance. 5、EASY OPERATION: With fine workmanship, the taper shank chuck holder is easy to change, set and maintain, the blade can be used to process a variety of materials.