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Breaking punch Panel Panel front Panel back Button Die Scrap Breaking Punch Hole Opening Process Projection tip thrusts and breaks through the panel. The panel is stretched and clack (break) occurs from the button die edge side. The clack (break) portion lines up with the button die edge and is expanded. The projection tip catches onto the panel and the panel is torn. The torn panel becomes scrap and is jammed into the button die. The scraps falls and hole opening is complete. Breaking Punch Punch Unit 392