... 2.strict quality control 3.with advanced equipments 4.prompt delivery 5.non-standerd parts Item Nostainless steel self drilling screws Materialsiron,aluminum ... ,electroplating,spraying,painting and so onBusiness scopeCNC center machining,drilling,turning,grinding,tapping,mould design and processing,casting,sheet ... your valued enquiries with detail specification. stainless steel self drilling screws