Description:  40Pcs Professional SAE Tap and Die Set. Taps and dies are cutting tools used to create screw threads. A tap cuts a thread on the inside surface of a hole, creating a female surface which functions like a nut. The die cuts a thread on a preformed cylindrical rod, which creates a male threaded piece which functions like a bolt. Both tools can be used to clean up a thread, which is called chasing.     Specifications:  Material:Stainless Steel;  Measurement System:SAE/Imperial;  Thread Type:NC, NF, NPT;  Taps and Dies Size:M3X0.5, M3X0.6, M4X0.7, M4X0.75, M5X0.8, M5X0.9, M6X0.75, M6X1.0, M7X0.75, M7X1.0, M8X1.0, M8X1.25, M10X1. 25, M10X1.5, M12X1.5, M12X1.75;  Storage Box Size:293x183x30mm/11.54x7.2x1.18";  Quantity:40 Pcs;     Features:  - 40Pcs Professional SAE Tap and Die Set with Tap Wrench and T-Handle Wrench.  - Taps & Hexagon Die With Thread-Pitch range from 4-40 to 1/2"-20.  - Includes Both Fine & Coarse Threaded Taps & Dies in Imperial Sizing.  - Professional Grade Set in Special Fine Carbon Steel For Excellent Strength.  - Includes: Adjustable & T-Handle Tap Wrenches, Adjustable Die Wrench.     Package Included:  1 Pc*Adjustable Tap Wrench (1/8" NPT-27);  1 Pc*T-Handle Wrench;  1 Pc*Die Handle;  1 Pc*Screwdriver;  1 Pc*Screw Pitch Gauge;  34 Pcs*Taps and Dies;  1 Pc*Storage Case