L.E. Wilson CH-3ACC Case Holder for 300 AAC Blackout Trimmer, Polished Steel L.E. Wilson Inc. a family owned and operated business since 1927 and have been making the Wilson Case holder and Case Trimmer Since 1936 The Case Holder holds your cases in place while trimming with the Wilson Case Trimmer Case Holders are to be used in conjunction with the Wilson Case Trimmer Some Calibers require two holders and will be sold as a set Made In the U.S.A