Forster's Classic trimmer is a larger version of the Original Forster Trimmer, and it is sized for trimming big bore cartridges for popular big game rifles and classic black powder calibers. The cutter shaft is larger than the Original trimmer (.522 inch diameter) and the mounting base is 6 and a half inches long. The Classic will accommodate cases from 1 and 7/8 inches long through 4 and one eights inches long with case mouths up to half inch in diameter, shorter big bore cases can be trimmed by substituting the shorter base from the Original Trimmer (FCTB101) for the longer Classic base. Collets FCT2005 through FCT2008 fit the classic Trimmer, order collets and caliber specific trimmer pilots separately.