The Kauplus Metric Stud Puller Set Idea for removes and installs the metric studs in difficult work areas and offers the best professional extractors available, allows removal and installation of studs without damaging threads. The Stud Removal Socket Set comes with blow case and Made in Taiwan. Set contains: 6mm Removal Socket 3/8" Drive, 8mm Removal Socket 3/8" Drive, 10mm Removal Socket 1/2" Drive, 12mm Removal Socket 1/2" Drive. Use with a breaker bar, or ratchet, or wrench, not intended for use with any impact tools. Caution: Always wear safety goggles for prevent any personal injury or properly damage.