cnc machine part 1.machine screw size,M3-M36 2.carbon, stainless steel 3.zinc plated,black,etc 4.flat,pan, etc. cnc machining ... yellow passivation, gold passivation, galvanizing, satin, etc.2.Processing Method: cnc machining, turning, milling, drilling, grinding, broaching, welding and assembly.3 ... 7)Shipping:8. Contact information:Tel: 0086-15994736840We are at service in 24 hours. Skype: szjbsy888