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It is hard for people with a loss in functioning to use writing tools. This self-help device can be helpful for writing with a ballpoint pen. It is not only light and easy to don and doff, but also is possible to use many types of pens. Mount the pen in the holder chuck. Attach it to your index finger as shown in the photo. Also fit in right or left hand. It is recommended to use the pens with a rubber grip. Can easily operate with lateral motion and slight rotation of your wrist.
Caution: The use of pens with diameter of more than 11 mm will cause damages of the chuck.