... .Press by hand 2.Easy to operate 3.single grommet, save cost and manpower single ring steel manual ... ring, then put the flex banner in machine, press handle to finish it. It is too slow, ... machine, easy to move the negative ring out, press machine handle can’t make grommets well, then get ... positive ring, no need negative ring, save cost; operation is easier, work faster, can make around 1000pcs/hour ...