The DC-300N 12" Premium Rotary Trimmer from Carl Cutters will produce clean and accurate 12" (30.5cm) repetitive cuts each time. When it comes to trimming mat board, card stock, plastic sheets or 1/8" foam board, you'll find this unit will not only serve you well but will rapidly become your studio staple. The trimmer, made from 100% recyclable material, holds your cutting material firmly in the locking rail. In addition, the base is pre-calibrated in common sizes to make alignment even easier. The luminous paper guide provides even more convenience.