The Original Forster Case Trimmer is the right choice for most calibers with bullet diameters from .171″ to .459″. It is actually a fine miniature lathe with a superior shell holder design based on a Brown & Sharpe type collet. Collets #1 through #4 fit this Original Case Trimmer and hold the rims of most rifle and pistol calibers within that range. Our Original Case Trimmer allows you to take your handloads to a new level.