CNC Truning Aluminum Control Valve Knob is ideally used for cylindrical shaped workpieces and for hexagonal-shaped raw materials. This knob is to provide a high quality results in a more cost- and time-effective manner. It is made by highly skilled experts and modern techniques. CNC Truning Aluminum Control Valve Knob is low in density but high in strength. It is also beneficial to provide a high production efficiency. It reduces the labour intensity and give an exact accuracy to machine.