1/4" Standard Steel Stamp Letter & Number Set,3/8 x 2-5/8 Standard-high quality stamps for general purpose uses at low cost. For hand-held, hammer-struck applications. Crowned striking surface ensures full force to the center of the stamp & textured shank provides firm easy grip. Packed in durable plastic storage containers. Individual stamps available, please call customer service. Contains 36 pieces packed in sturdy steel index box that fits flat in toolboxes 20626 Yes - CHROMIUM (HEXAVALENT COMPOUNDS)