OTC (6987) Metric Stud Remover Set - 4 Piece The best professional extractors available Designed and tested to reach studs in difficult work areas Set features a 3/8 inch drive for 6mm and 8mm stud sizes, and a 1/2 inch drive for 10mm and 12mm stud sizes Includes OTC 6987-6 6mm stud remover, OTC 6987-8 8mm stud remover, OTC 6987-10 10mm stud remover, and OTC 6987-12 12mm stud remover All housed in a blow molded storage case