The No.23 is a "leaf-shaped" blade sharpened along its leading edge. Used for making long incisions such as an upper midline incision of the abdomen during the repair of a perforated gastric ulcer. Box of 10 Scalpel Surgical Blade No. 23 Sterile pack carbon steel blades Each blade is individually sealed in foil packets These blades will fit scalpel handle No. 4, 4L, 4