Forster Accu-Ring Die Lock Ring

The Accu-Ring is a sizing/seater die lock-ring which provides reference marks in increments of thousandths of an inch (0.001").Sizing die (primary use) - Designed mainly for sizing dies, the Accu-Ring helps you zero in on what you want the headspace length of your cases to be.Seater die (secondary use) - The Accu-Ring also allows you to make fine adjustments to bullet seating depths.