Description: 🔧PERFORMANCE & DURABILITY : Excellent cutting performance All cutting teeth have been precision CNC machined and undergo precise heat treatment to obtain the best thread performance. Cutting external and internal threads is a comprehensive setting, cutting and updating the precise standards for external and internal threads. 🔧COMMON SIZES IN METRIC & SAE: Include (20) Metric taps and dies: M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.25, M9x1.25, M10x1.0, M10x1.5, M12x1.75; (20) SAE Fractional taps and dies for coarse thread (UNC): 4-40 NC, 6-32 NC, 8-32 NC, 10-24 NC, 12-24 NC, 1/4-20 NC, 5/16-18 NC, 3/8-16 NC, 7/16-14 NC, 1/2-13 NC; (12) SAE Fractional taps and dies for fine thread (UNF): 10-32 NF, 1/4-28 NF, 5/16-24 NF, 3/8-24 NF, 7/16-20 NF, 1/2-20 NF; (2) NPT tap and die: 1/8-27 NPT 🔧CONICAL TEETH DESIGN & VERSATILITY : Constructed from hardened alloy steel for maximum strength and longevity, Perfect to create new threads or repair damaged threads on most metals like carbon steel, cast iron, aluminum, brass, copper and stainless steel 🔧EASY STORAGE : Equipped with heavy duty case, easy to store and carry. It has identified slots for each item to keep it neat and easy to find.