- Taps and dies are essential tools for creating screw threads in various metalworking projects, ensuring precision and durability in your work. - Use these tools with cutting oil to restore old, rusted, or worn threads, like those found on car spark plugs, effectively removing corrosion and carbon buildup for enhanced performance. - The tap cuts or forms internal threads inside a hole, creating a nut-like effect, while the die is designed to cut or form matching external threads for bolts. - Crafted from high-quality alloy steel, these taps and dies promise superior performance. With proper technique and lubrication, they effectively tap and thread common metals including carbon and alloy steel, cast iron, aluminum, brass, and bronze. Applications: 1. Automotive Repairs: Perfect for refurbishing spark plug threads or any threaded fastener requiring restoration. 2. Metal Fabrication: Ideal for creating custom threaded elements in metalworking projects, ensuring tight and secure fits. 3. General Repairs: Use in home repairs or maintenance tasks where precision threading is needed for a secure hold. With this reliable set of taps and dies, you will ensure optimal threading and performance in all your metalworking tasks.