... size ,high qulity and perfect finish on surface. Metal Screw is made by one of the CY hareware manufacturer : ... 1) 8years production experience,2) CNC machining hardware manufacturer ,3) Varuiys types 4) OEM is ... , sand casting4.Machining: turning, milling, drilling, grinding, threading, CNC machining, etc.5.Finishing: sand blasting, polishing, plating, acid treatment ...