Century's 24 Piece Metric Tap & Die Set features precision cut threads, accurately formed for consistent, exact threading. Heat treated and tempered for file hard threads, and longer, useful life. Designed for hand cutting applications. Set arrives in a durable, blow-molded case. Sturdy metal clasps ensure the case stays closed during transport and storage. Set includes: 3mm through 12 mm, and 1/8" BSP, metric taps and dies, 3-12 mm adjustable tap wrench, and 1" die stock.