Irwin Industrial Tools 97311 Metric Tap and Hex Die Set, 25-Piece This tap and die set contains pieces suitable for maintenance and repair work Taps and dies feature high-carbon steel construction for durability Metric taps are designed for hand-threading work in various materials and produce a class 2B thread Metric: 1-7/16" hexagon: 14mm - 1.25, 14mm - 1.5, 14mm - 2.0, 16mm - 1.5, 16mm - 2.0, 18mm - 1.5 and 18mm - 2.5 Metric: 1-13/16" hexagon: 20mm - 2.5, 22mm - 1.5, 24mm - 2.0 and 24mm - 3.0 We're working with a variety of tradesmen to solve endless fastening challenges: Irwin Hanson Taps and Dies are the answer. Whether creating new tools from raw steel or repairing damaged and worn threads, achieving a precise fit is essential. Irwin Industrial Tools sets the standard for delivering quality every step of the way in your threading applications.