OMNIGRID-Rotary Cutter cuts fabric paper leather vinyl matboard and even foamcore in any direction. Blade is only exposed when pressure is applied to rotary cut. The safety guard slides back when pressure is applied and slides back into place when cutter is lifted from cutting surface. No button to engage it is all done automatically. Grips on lower part of the handle provide extra comfort. Blade size: 45mm. Made in China.