... to operate 3.single grommet, save cost and manpower single ring steel manual eyelet hole punching machine Dimension: 150*150*100 mmMould ... is 2 parts/set, positive ring and negative ring. To make grommet need install positive ring, and negative ring, then put the flex banner ... make around 1000pcs/hour; light weight, rivalrous price. Promotion! single ring steel manual eyelet hole punching machine