D-shaped thumb post
Thumb post that fits most Carter and Truball hand held release aids. Has both a central and offset holes to attach to the release aid so you can position it just right for you. Supplied with a 3.5mm self tapping screw. It was designed so you can rotate it to perfectly fit in the joint of your thumb. Then just pull through the shot to activate the trigger. These are usually made to order so may take a day or two after ordering before dispatch.