Replacement blades for use with Cos‑Tools Straight/Bevel Cutter are sold in packs of 5. Reversible to use both ends. The best way to cut is with a sharp blade. Over time, your tool's blade will wear down and degrade the quality of your work. These replacement blades are specifically sharpened to produce professional quality cuts. Always use Cos-Tools replacement blades for outstanding Cosplay Pros approved results.