Relief to tired and arthritic hands comes in the form of a Double Grip gel pen.
Through partnership with a research team at Chiba University, Pentel has produced a writing device that leverages four main points of contact in your hand:
one each from your thumb, index and middle finger as it grasps the body shaft, and then a special fourth point near the palm of your hand via a Adjustable rear grip.
The Adjustable rear grip support can be move so that the area near the palm of your hand can rest on the pen.
The result is a writing experience that requires less pressure, has more stability, and produces less writing fatigue. 
The pen can be adjusted to different hand sizes and of course the rear grip support can be closed so that the pen can be used as normal. 

Japanese Patent item

It corresponds to multiple orders. I also correspond to requests for large quantities of store sales. Please contact me with a message.
 
 

• Condition: New unused. Alcohol sterilizated.
• Size: 20mm * 145mm  26.5g
• Brand: Pentel
• Country/Region of Manufacture: Japan
• Ink color: Black
• Refill: Pentel KLR5 / KLR7