... labor, which increase cost both in labor and time. Further more, the punched grommets are normally ... account of the advantages of its labor saving, time saving and better bingding quality.It can accurately ... ...etc.,. therefor it can save more working time and manpower, makes work easier and faster.It ... the "Option" button, set the "Auto" led light up, use buttons below to set punching frequency(range 0.5 ...