The Forster Original Case Trimmer is the ideal choice for trimming cases from .17 caliber all the way to .458 caliber. This trimmer can accommodate diameters from .171 to .459 inches as well as cartridges that are no greater than 2.94 inches. Used by people who enjoy reloading this trimmer is made to trim brass cases with precision and according to specifications. As a fine mini-lathe the trimmer uses the same type of collets as a Brown & Sharpe. If needed trimmers for shorter and longer cases are sold separately.