Features Wide Size Coverage ????: Includes common sizes (17mm, 19mm, 21mm, 22mm) – more versatile than regular deep bolt extractor kits, meeting broader work needs for various fasteners. Damaged Fastener Savior ????: Perfect for removing damaged, stripped, rusted, or stuck fasteners (screws, nuts, bolts)! Works with 1/2-inch square drive wrenches, ratchets, or breaker bars to easily unscrew stubborn rusted bolts. Durable & Rust-Proof ????: Crafted from heat-treated chrome-molybdenum steel (CR-MO) for exceptional strength and durability. Internal reverse spiral grooves grip fasteners tightly for better removal; comes with a portable plastic box ???? for neat storage and easy organization.