This Kai 5045 rotary cutter easily cuts through leather or multiple layers of heavy-duty fabric. It can be used freehand or in combination with a to make quick, straight cuts. It has a comfortable grip and can be used interchangeably between left and right-handed makers without having to adjust any settings. Its 45mm blade is only exposed when pressure is applied, for extra safety! Includes one blade. Replacement blades can be purchased .