The Omnigrid 45mm rotary blade is used with 45mm rotary cutters for cutting materials for quilting sewing DIY home decorating and crafting projects - it will cut fabric paper leather vinyl mat board and foam core in any direction. The blades are made with high-quality tungsten-steel and provides maximum sharpness. For best results use with the Omnigrid 45mm rotary blades; most other 45mm blades will also work with this cutter.