【Material & Storage box】The thread chaser set metric and standard is made of carbon steel material, making the thread chaser kit has better strong strength and durability. The hard box may protect rethreader kit from damage, and it is convenient for you to carry and store
【Easy to Distinguish】3 colors of the thread restorer set : silver (UNC), black (UNF), and gold (metric), which is easy for you to distinguish . The thread chaser kit and each holes of the box are marked the specification, which can help you to find the right one you need quickly