It's a cinch to cut straight lines when you use the 13 in (33 cm) Portable Trimmer. A unique easy-glide blade system yields precise straight cuts while an ergonomic custom-fit handle provides a smooth grip over hundreds of cuts. The dual-hinged rail makes it simple to quickly load materials measure and cut from either side. Continuous measuring marks rulers in inches and centimeters and 1/4 in (0.3 cm) grid marks - along with a 16 in (40 cm) swing-out arm - help you measure for accurate results. Keep replacement blades in the convenient storage compartments on the underside of the trimmer.