◎ ER COLLET PUNCH FORMER
     1. Collet Dividing Punch Former have collet size 4, 6, 8, 10, 12, 16, 20m/m,
          7Pcs in total. Collet flexible whthin 1mm.
     2. For workpiece diameter smaller than 4mm, use shank 20mm/ER16 collet chuck.
     3. It clamps workpieces quickly and steadily when processing without checking the centre.