2.Revolutionary Features:DISCOVER-DF is one new designed machine that with seven stroke length options:2.4/2.7/3.0/3.3/3.6/3.9/4.2mm.
3.Easy Changed:Stroke length easy changed on working, The DISCOVER-DF Pen Made for All Pro Artist.
4.Simple and Quick Switching of Machine Pen Stroke Lengths: clockwise or counterclockwiseTurn the knob in the same direction to switch all Required stroke length.
2.Revolutionary Features:DISCOVER-DF is one new designed machine that with seven stroke length options:2.4/2.7/3.0/3.3/3.6/3.9/4.2mm.
3.Easy Changed:Stroke length easy changed on working, The DISCOVER-DF Pen Made for All Pro Artist.
4.Simple and Quick Switching of Machine Pen Stroke Lengths: clockwise or counterclockwiseTurn the knob in the same direction to switch all Required stroke length.