Carton Sizer helps you customize boxes to the size you want and reduce the amount of packing material. For larger cartons, the Carton Sizer can reduce the size enough to avoid volume pricing by small package carriers. This innovative device scores the inside walls of cartons allowing you to stock fewer carton sizes. For exact sizing, the metal shaft is marked in 1/8" and centimeter graduations. For even scoring, a vice grip with a dial locks around the shaft and features a corner ledge to be set on top of your box. The Carton Sizer also features a twistable safety cap over the cutter for safety as well as plastic accents.