The Cam lock trimmer is bench mountable or will clamp in a vise. The unique way that the case is locked in place in the shell holder so that all lengths are accurately measured from the head to the cartridge with no variation due to rim thickness. Just a quick turn of the Cam lock locks the case in place, rock solid. Just a touch releases it. This trimmer features a taller frame so you don't bang your knuckles on your bench, and the ergonomic handle fits your palm for easier trimming. Includes: 7 pilots #1 (.224) #3 (.243) #6 (.277) #7 (.284) #9 (.308) #15 (.358) #19 (.452)