12Pcs Tap And Die Set Metric Wrench Cut Hand Threading Tool Tungsten Carbide

The wrench handles securely hold the tap and die pieces. The milled ends of the adjustable tap and die wrench handles enable a slip-free grip for demanding jobs. 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.