... high quality3.)materials:steel,stainless steel,brass,zinc alloy,aluminum,iron,and ect.4.)process/treatment:cutting ,stamping,perforating, bending ... , welding,plating,powdercoating,assembling,5.)machine:CNC lathes,machining centers,pressing machines,drilling machines,grindingmechines, injection ... old customers' email or phone call. Thanks High Precision Stamping Parts