32 PCS HSS Tap and Die Set Metric Wrench Cut M3-M12 Hand Threading Tool Tungsten Carbide Tap Die Screw Thread Making Tool Bit Set Engineer Kit with Tool Case Blue

Taps and dies are tools used to create screw threads in all kinds of metalwork projects.

Both tools can also be used, with a cutting oil, to clean up dirty, rusted, or worn threads in old nuts and bolts eg car spark plug threads, which often suffer from corrosion and a buildup of carbon.

'Tap' is used to cut or form a thread on the inside surface of a hole creating effectively a nut, whilst a 'die' is used to cut or form matching bolts.

Milled from high quality alloy steel these taps and dies, with accurate usage and cutting oils, will tap and thread typical metals such as carbon and alloy steel, cast iron, aluminum, brass and bronze.

Three and four flute plug taps and dies with tapered coarse and fine threads. The tapered cutting edges assist in aligning and starting the tap into an untapped hole.