Features • Unique air flow design accelerate release of fabric tension, greatly shortening the time required to loosen fabric •Fast speed: 50-60 pcs / minute.• Safety: punch safety protection devices available •Feature: feeding plastic washer automatically,using material mixed vibration bowl,button and washer double rails combine together. •Loss reduction: double- servo drive, success rate 99%, avoid unqualified riveting caused by manual work. •Power saving and ECO-friendly: pneumatic drive feeding buttons, servo-drive riveting , Machine automatically power off when stopping overtime