The Rotatrim RC Professional is a strong, durable cutter that ensures accurate performance. It is used with rotary trimmers.It has hand-finished tungsten steel flat construction featuring rotary blades, laminated MDF girded solid baseboard with side ruler with precise marking, and cursorThe self clamping strip of this rotary cutter enables clear view to the cut material and helps cut the material precisely by holding it in placeThis cutter has twin chrome-plated steel guide rail design, which eliminates the swivel cutting head