This is a hand-carved hand rest made from Japanese cypress (hinoki) wood. The two below are placed side-by-side for comparison. The shaft diameter in this photo is 5mm, but 4mm versions are also available. When purchasing, please specify whether you would like a 5mm or 4mm diameter, and the length from the palm rest to the tip of the shaft in centimeters. I will then customize it to your desired length. The larger hand rest provides increased stability for the right hand. Please give it a try.