The anvil base allows you to measure uniformity of ammunition from the base of the loaded round to the ogive of the bullet. Can be used in conjunction with Head Space gages, also. Attaches directly to the jaws of a caliper.
Please contact Hornady directly with any concern about performance, manufacturing defects, or warranty issues. Their contact information is found on their web site www.hornady.com. Their main switchboard phone number is 308-382-1390 Monday thru Friday 8am to 430pm Central Time.