Miltex Sterile Safety Scalpels Comply with OSHA directive for the Needle Stick Safety and Prevention Act. Sterile with a five-year shelf life. Individually packaged in sealed, peel-apart pouches. Metric ruler on each scalpel. Sizes clearly marked on each scalpel blade. When opening, scalpel blade locks with an audible click. 10 scalpels/dispenser box.