Precision fixtures - Each drill bit is precisely milled to ensure safe and accurate fixation on the screw sur-face. Fixed type prevents slippage and sliding, ensuring smoother fixation and better control when reused. Magnetic tower - The powerful integrated magnetic head keeps the screws in the correct position. This improved magnetic grip reduces falls or misalignments and enhances maneuverability - especially in narrow Spaces or overhead. Stable rotation - These insertion keys have highly concentric circular shafts, precisely aligned with screws. The linear design minimizes jitter and vibration, ensuring balance and control during use. Long S2 steel - Each part is forged from high-quality S2 steel, providing the highest hardness and torque capacity. These bits are wear-resistant and can provide stable performance even under normal use. They are also reliable at high speeds. The anti-rust and anti-corrosion coating protects each part from rusting and dampness. Even when working on a damp sur-face or storing tools in a damp environment, this coating can maintain structural integrity. Specification Tooth material: High-quality S2 steel core This kit includes: cross-slots and jack key bits. Opinion Performance can vary depending on the tool speed and torque Settings.