Redding Bullet Seating Micrometers are the perfect addition to any bullet seating die that utilizes 1/2-20" threads. For years Redding Competition Seating Dies have been known as one of the most accurate seating dies made because of their bullet seating micrometer that allows reloaders to fine tune seating depths to the most accurate for their load. These plugs are machined from quality steel alloy and hand finished and inspected to ensure the consistent, reliable performance. These seaters are a direct replacement for the original seating plugs and can easily be changed from one die to the next.This is the micrometer for flat nose bullets. Redding also produces micrometers designed specifically for VLD bullets and standard bullets including polymer tipped bullets. Notes: Bullet Seating Micrometer for Redding diesNot for use with Redding Competition Seating DiesWill not work with other brands of dies