Description of Bard-Parker No. 12 Carbon Steel Surgical Blades: Bard-Parker No. 12 Carbon Steel Surgical Blades are sterilized, single use blades that come in packs of 50. Each individual blade comes in a sealed pouch made of aluminum foil having an inner lining which helps protect the blade and the user. The blades are among the Bard-Parker Rib-Back series and are a good packaged surgical product option for dentists.