The L.E. Wilson Rifle Case Holder holds the case for trimming, primer pocket reaming, neck reaming and deburring. The L.E. Wilson Trimmer Case Holder provides the ultimate accuracy and uniformity for trimming your cases. The unique design of the case holder supports the case body, much like a chamber of a firearm. The Case Holders are precisely manufactured for consistent results and repeatability. The FIRED Case Holders are for Neck Sized Cases. NEW Case Holders work with new, unfired brass or cases that have been full length sized. If a type isn't specified the holder will fit both Fired, New, Neck or Full Length sized cases. Mfg: L.E. Wilson