RCBS #90316. RCBS Case Trimmers are designed to be user friendly and provide very accurate results. These shellholders are required to hold the brass cases while they are being trimmed. Works with: RCBS Trim pro, manual and power case trimmer only. Fits: 7.62x25mm Tokarev, .30 Luger (7.65mm Luger), .30 Mauser (7.63mm Mauser), .356 TSW, 9mm Luger, 9mm Makarov, 9mm x 21, 9mm, 23 Winchester.