MATERIAL: The thread repair kit is made of quality metal material, which make it has high durability. WIDE USE:The thread repair kit is applicable to all types of processing machinery, meeting different needs. PORTABLE: The thread repair kit comes with transparent plastic storage box, easy and convenient to store and carry. EFFICIENT: The thread repair kit have more efficient maintenance efficiency than most other substitutes. USEFUL: Excellent choice to restore damaged threads wherever steel, iron, aluminum and metal threads are peeled off, crossed or damaged