The L.E. Wilson Case Trimmer is one of the best trimmers on the market. The L.E Wilson Case Holder Clamp makes it even better by eliminating the need to hold the case by hand while trimming. FeaturesAn Alternative to Holding the Case Holder Down with your HandSet the Case Holder on the Rails of the Trimmer then Swing the Clamp Over the Top of the Case HolderAn Adjustment on Top of the Clamp Allows you to Increase or Decrease PressurePart # CT-SSCLMP is replaced with CTP-ACLMPMay Not be Compatible with Some Q-Type Case Holders