The Ringpen was designed to let the hand write in a natural repose posture. Just place your finger through the opening and rest it on the curved side. It has been great for those with arthritis or other hand pain because of the neutral grip it allows for when writing.
The Ringpen prevents the buildup of calluses because the fingers are holding the pen differently. It has been known to reduce or prevent writer’s cramp that is normally caused by the regular stick pens.
It is available only in black casing with black ink.