JGZUI S2 Steel PH2 Magnetic Screwdriver Bit Set Built for professionals who demand reliability. Each bit is machined from S2 alloy steel, heat-treated to HRC 60+ hardness, and finished with an anti-rust coating for long service life in demanding job-site conditions. The PH2 cross-head tip is precision-ground to fit No. 2 Phillips screws with minimal play, eliminating cam-out and protecting both the bit and the fastener. The integrated magnetic core holds screws securely for one-handed starting - essential for overhead or tight-space work. What sets these bits apart is the anti-slip barbed tip design. The close-bite geometry grips the screw head under torque, transferring full power without slippage or damage. This means faster work, fewer damaged screws, and bits that last longer. The universal 1/4-inch hex shank is compatible with all standard quick-change chucks, including drill drivers, impact drivers, and electric screwdrivers. Material: S2 Alloy Steel Tip Type: PH2 Phillips Shank: 1/4" Hex Quick Change Finish: Anti-rust coating Quantity options: 5-piece single-length sets, 4-piece multi-length set, 6-piece full-length set