Sculpting tip for those with Carpal Tunnel and Arthritis

For the days that I just can't hold anything between my thumb and finger to sculpt a head I go to this method.  While it only helps with sculpting heads, it's a huge help for me on problem days, since the head can sometimes be the most time consuming. I'm terrible at giving instructions,and  usually end up confusing instead of helping.  But, I thought this was fairly simple and if it helps one person, I'm happy.