Brand new 11pcs Rounded Bolt Remover, Extractor Socket Set for Removing Damaged, Frozen, Rusted, Rounded-Off Bolts, Nuts Screws This 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 this 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. 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 comes with standard 3/8" square drive head and 1/4? hex quick adapters allowing you to use your preferred hand, air, or power tool. It also comes with a knock-out pin for easy removal. 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. Material cr-mo Drive size 3/8? Length 65mm Size included: 1/4? (6mm) 5/16? (8mm) 3/8? 7/16? (11mm) 1/2? 9/16? (14mm) 5/8? (16mm) 11/16? 3/4? (19mm) 1/4? hex quick adapter Knock out pin