Zeluga 25-504 S2 Steel PH2 Impact Screwdriver Bits, 1" (25mm) Magnetic Impact Drill Bits for Impact Driver, Heat-Treated & Rust-Resistant, 30 Pcs. Made of S2 shock-resistant steel with heat-treated tips, these 25mm PH2 bits withstand 3x higher torque than standard bits, preventing stripping and deformation in heavy-duty drilling/screwing. Precision-machined 1/4" hex shank fits all impact drivers, cordless drills, and screwdrivers from Dewalt, Milwaukee, Makita, Bosch, Ryobi, and other major brands (magnetic holder included). Triple-layer chrome plating resists rust, oil, and abrasion, ensuring smooth performance in humid workshops, automotive repairs, or outdoor construction projects. Includes 30 PH2 bits with a compact storage case, offering backups for contractors, DIYers, and professionals tackling repetitive tasks. Built-in neodymium magnets secure screws firmly to the bit tip, reducing wobble and slippage for faster, safer operation on metal, wood, or drywall surfaces.