Bench Rest Seater & Full Length Sizing Die Set. The Full Length Size Die is used when loading for actions other than Bolt Action Rifles with each reloading cycle. If you are neck sizing for Bolt Action Riles, eventually after several firings the resulting brass flow will require the case to be full-length sized.
I like the way the Forster dies line up the case with the the bullet. I consider it a step up from the rcbs dies I normally have been using. It’s a bit pricey so I only use Forster dies for my most important loads