About This Efficient Removal: Thinkpro bolt extractor set covers the most commonly used and requested standard (SAE) and metric (mm) sizes, allowing you to easily extract nuts, bolts & screws that are rusted, worn, painted over, or even completely stripped or broken. Designed for Tight Space: Our nut extractor socket set has a longer and slimmer profile. This particular design of extractor is well-suited to tight access, compensating for the shortcomings of traditional hex extractors. Superior gripping power: The internal thread of thinkpro upgrade bolt extractor with reverse spiral flutes has a good grip on the bolt, providing excellent torque; the more you turn, the tighter the socket grips. Convenient to use: Our bolt extractor comes with standard 1/4" and 3/8" square head and hex adapters, allowing you to use your preferred hand, air, or power tool. It also comes with a knock-out pin for easy removal. Trustworthy quality: Each strip bolt remover socket set is manufactured from high-hardness CR-MO steel for superior durability and lifespan and is stored in a heavy-duty case with clear laser-etched dimensions for easy carrying and identification. Overview Brand : Thinkpro Material : Chrome Molybdenum Steel Finish Type : Polished Number of Pieces : 32 Drive System : bolt extractor kit 1/2 inch drive&3/8 inch drive