This high-quality replacement cutting blade from CFS Binding Supplies is designed to fit the POLAR 66 E and Power Max 28 paper cutters, and provides superior cutting performance and extended cutting life. Our razor sharp replacement paper cutter blades are manufactured to precise OEM specifications and will outperform similar blades from other manufacturers. It is always a good ideal to have an extra blade or knife on hand when you send your other blade out for sharpening or in case you need to replace a blade that has been repeatedly sharpened or has become nicked. This knife has a bi-metallic composition consisting of one part high-alloy tool steel and one part standard grade steel. A special fusion process bonds these two together to produce a high quality knife at a great price.