Code 3122 applies to employers engaged in manufacturing and sharpening knives such as table, carving, butcher, and pocket as well as straight razors.  Forged stock or strip steel, wood blocks, metal, plastic or prefabricated handles are received from outside sources.

Stainless steel is cut and shaped to specification on power presses, forged, and heat treated to harden the metal in ovens.  The metal is then tempered and ground, polished, buffed and sharpened.  Plastic or wood handles shaped by machine are then attached by riveting.  The incidental casting or molding of either metal or plastic in enlarging or bolstering the shank of the blades or to form handles also falls within the scope of this classification. In-shop repairs and sharpening of manual hedge trimmers by a tool sharpening service are inclusive under this classification.