RCBS CASE TRIMMER SHELL HOLDER #15 90315The RCBS Trim Pro Case Trimmer feature a unique shaped shell holder to firmly hold your rife and pistol cases in perfect alignment with the cutter. The system allows for accurate and repeatable case trimming lengths and leace the case mouths square to the body. The Trim Pro Shell Holders are numbered the same as our standard shell holders to make identification and use simpler. Available individually packaged, or in pre-packs, for most popular rifle and pistol cartridges.