Hollow punch machining part: 1 Metal leather punch 2 Precision punch machining 3 Various materials 4 Your drawings welcome Certification (ISO9001:2008) OEM Service Offered1. Material: stainless steel, aluminum sheet, phosphor copper, brass, iron, rubber, plastic, etc or according to drawings and samples.2. Thickness: as your drawings’ requirements.3. Precision machining: stamping, punching, ...