... OEM manufacturer 3.No burr, no scratch Item:Steel Sheet Metal Stamping case/boxDescription:1. Material: stainless steel. Iron (SPCC ... : cutting, stamping, punching, bending,welding,deep drawing and Sheet Metal Fabrication;3. Surface treatment: powder coating, chrome plating, zinc ... we have the employees more than 400.Steel Sheet Metal Stamping case/box carbon steel stamping metal joint pallet hinges