Precisely cut straight lines when you use this 12" Trimmer. An 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 (sold separately) in the convenient storage compartments on the underside of the trimmer.