This linear sharpener sharpens your blade with the same motion you use when cutting fabric. You don't even have to touch your blade, just leave it in your cutter! Sharp blades require less pressure to cut, giving you more accuracy and less chance of slipping. *TrueCut - The Grace Company products cannot be sold and advertised on or through any third-party website, online marketplace, mobile application, or other online forum without limitation such as Amazon, eBay, Groupon, Jet, Walmart, etc. without the prior written consent of TrueCut - The Grace Company.* The high-quality sharpening stone in hones your rotary-blade similar to the way that people sharpen knives. You don't even have to remove the blade from the cutter to use the Linear Sharpener! Just pass the cutter back and forth through the sharpener, using the same kind of motion you use when cutting fabric. It works with any size or brand of rotary cutter. Product Features: Sharpens any brand of rotary blade from 28mm to 60mm in diameter. Sharpens your blade without having to remove it from the cutter. Long-lasting, high quality sharpening stone. Hands-off use! Non-slip feet keep the sharpener from moving while in use