Foamwerks Straight cutter is designed for use with foamwerks channel rail and features adjustable blade depth, quick change blade clip, magnetic blade slot, on-board blade storage and 5 blades. This trimmer is perfect to cut straight edges on any depth of foam board ranging from 1/8 in to 1/2 in. IMPORTANT: Always use a scrap piece of foam board underneath the piece you are cutting. This is to protect the tool and extend the life of the blades.