The 181-22 two star sterile scalpel blade is packaged in individual foil packs. The blade is similar to the 10 blade but has a curved cutting edge and a flat unsharpeed back edge. This blade works with a 181A-SE scalpel handle.Specs amp; FeaturesBlade 22, Sterile, Application: For use with 181A-SE handle, Quality: , Surface Resistivity : Conductive, Shape: Round, Material: SS