Rapid Edge Long-Lasting Rapid Edge Serrated Carpet Blades (10 blades), 1-Pack PATENTED SERRATED BLADES: Our Rapid Edge blades feature multiple cutting edges to distribute friction, allowing each one to cut faster and last longer than a traditional box cutter knife blade. EASILY TRIM AND SIZE CARPET: Specially designed to slide through carpet and backing, these carpet knife replacement blades are a great addition to any handyman or contractors toolkit. VERSATILE DESIGN: The blades are designed to fit into any standard utility knife, so you can use them with your existing knives or pair them with one of our ergonomic Edge models. DURABLE CONSTRUCTION: The serrated blades are made with a tough metal that can stand up to regular use on the job and during your own home improvement projects. CONVENIENT VALUE PACK: The package includes 10 long-lasting carpet blades, allowing you to get through several projects before you need to stock back up.