[Material]: Our Thread Repair Tool is crafted from premium Steel, ensuring durability and . It can withstand a hardness of HRC48-50 degree, making it strong and reliable for long term use. [Versatile Functionality]: This Thread Restoring File is designed to repair damaged external threads on studs, bolts, screws, pipe and fittings. Please note that it's only suitable for external threads and not for internal threads. [User Friendly Design]: The handle of the Thread Restorer File can be turned over as needed. It features a detachable rubber sleeve that prevents slipping during use, providing you with accurate control over your work. [Easy to Use]: Whether you're dealing with left hand or right hand thread, this Thread Repair File makes the operation simple. A few minutes of work allows you to easily fix the thread and tighten the nut. [Function]: This Thread Repair File is designed to repair damaged threads on screws and other hardware, making it an essential addition to tool case or workshop. Colour:Black Material:steel Size:21.5cmx1cm/8.46inchx0.39inch Package Contents: 4 x Thread Repair Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.