No other case trimmer in this price range features a micro-adjustable cutting head! Based on the proven design of our earlier case trimmer, this new model is packed with many other valuable features Hornady customers have been asking for. Thanks to the unique way the case is locked in place in the shell holder, all trim lengths are accurately measured from the base of the cartridge, with no variation due to rim thickness, etc. It uses standard shell holders and includes the seven most popular pilots: #1(.224), #3(.243), #6(.277), #7(.284), #9(.308), #15(.358), & #19(.452). A light touch of the cam lock knob locks the case in place, rock solid; another touch releases it. No need to crank the locking knob. Holds the case square with the cutter for precision trimming. New, larger cutter trims cases up to .50 caliber in diameter. Made of ultra-hard, super-sharpened tool steel that keeps its edge practically forever. Easily removed for resharpening or replacement. Change settings from longer to shorter in increments of 1/1000" without ever moving the case.