Whether you are removing screws, creating new threads, or repairing damaged and worn ones, achieving a precise fit is essential. Finish metal threading and tapping while also chasing threads when they become damaged with the ABN | 110-Piece Metric Metal Threading Tool Kit Taps and Dies Set. This set helps you work with damaged nuts, bolts and threads. When a replacement bolt is hard to find, you can use this thread tap set to remove imperfections from threads. They restore threads of various sizes and are for both external and internal use so you can repair any type of threading by hand. To avoid binding when using holder, back off slightly and use a rocking motion to advance the threads and clear any loose chips. Tap sizes range from M2-M18 along with thread pitches from 0.4-1.5mm. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.