Hollow punch machining part: 1 Metal leather punch 2 Precision punch machining 3 Various materials 4 Your drawings welcome Certification ( ... and samples.2. Thickness: as your drawings’ requirements.3. Precision machining: stamping, punching, bending, CNC lathes, milling drilling, grinding, ... cylindrical hollow punch set, Leather working, Punch and die, Metal punch, Machinery parts, Machining parts