Thumb Positioning Aid:
- For Allchin Scope Mounts 
- For any other mount you wish to install it on 
- Helps shooter consistently place the left hand in proper schooting position
- shot to shot recoil control is enhanced

In the Box:
- Thumb Positioning Aid 
- 3 4x40 Screws

This part was developed to help the shooter consistently place the left hand in the same place - draw after draw. In addition, shot to shot recoil control is enhanced. 

Installation:
Using a #43 drill, punch three holes .375" on center in the bottom of your scope mount and tap with a 4x40 tap. Some material may have to be removed from the thumb aid to put the holes in the correct location. Install with a little Blue Loctite.

No warranty is implied. Installation may void manufacturers warranty. Improper installation may damage part of receiving piece. This thumb positioning aid should be installed by a qualified gunsmith.