The Forster Original Case Trimmer is the ideal choice for precision brass case trimming accommodating calibers from .17 to .458 with diameters from .171 to .459 inches.Forster Original Case Trimmer (Model CT1010)Handles .17 caliber to .458 caliber cartridgesAccommodates case diameters from .171 to .459 inchesMaximum cartridge length of 2.94 inchesUses Brown & Sharpe type collets for precisionFunctions as a fine mini-lathe for accurate trimmingPerfect for reloading enthusiasts who demand precision brass case trimming to exact specifications. Additional trimmers for shorter and longer cases are available separately to expand your reloading capabilities.