It’s a cinch to precisely cut straight lines when you use the 12" (30.5 cm) Portable Trimmer. A unique easy-glide blade system yields precise, straight cuts every time, 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 ¼" grid marks – along with a 15" (38 cm) swing-out arm – help you measure for accurate results. Keep replacement blades in the convenient storage compartments on the underside of the trimmer.