Description
Scroll down on the page to see the rim thickness gauges...
From their website "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. "
On sale through the end of April
Go to their "Parts Installation" page for detailed information on how this gauge is used. Can be used with both a dial caliper or a dial indicator.
The last thing that you want is a bad rimjob!