The OEM Tools 25610 Thread Repair System Kit is a high-quality set of heli-coil inserts designed for repairing and restoring damaged threads. This kit includes 4 pieces and is specifically made for a 1/2"-13 UNC thread size. The OEMTOOLS brand ensures reliability and durability, making this kit a valuable addition to any automotive tool collection. Perfect for restoring threads in various automotive applications, this set provides everything needed for efficient and effective repairs.