The Omnigrid 28mm rotary blade is used with 28mm rotary cutters for cutting materials for quilting, sewing, DIY home decorating and crafting projects. This rotary blade will cut fabric, paper, leather, vinyl, mat board and foam core in any direction. The blade is made with high-quality tungsten-steel and provides maximum sharpness. For best results, use with the Omnigrid 28mm rotary cutters. Most other 28 mm cutters will also work with this blade. Always use a rotary cutting mat to protect not only your surface, but your blade. For best results, use with the Omnigrid 28mm rotary cutterDetails:Silver28mm blade size6 packs of 2 blades12 blades totalFor use with most 28mm rotary cuttersSteel