RAVEN EYE CUSTOM RIM THICKNESS MEASURING TOOL
 
According to Eley, the manufacturer of the highest grade rimfire ammunition available (used in the Olympics), the single most important factor in rimfire accuracy is:  the thickness of the rim.
 
The kit includes the following:
Contents:
1          Rimfire rim thickness measuring gauge for 22LR, 22 short and 17 Mach 2
4          Target dots
1          Set of instructions
 
The kit does not contain a dial caliper or dial indicator. 
 
FYI:  The dial indicator I have shown in the photos is a Smith and Wesson, 0.0005 x 1/4" indicator.  When I purchased it, it was model #SW1073.  However, many other models work well.  Complete instructions are available on our website.