Features: 8-piece 200mm/7.9” length Torx screwdriver set in the following sizes: tamper-proof Torx bits T8, T10, T15, T20, T25, T27, T30, T40 Made from sturdy alloy steel with high hardness up to 60HRC and high torque resistance. Surfaces feature special anti-rust treatment for long-term use The screwdriver bit tip is strongly magnetic, allowing for easy screw attachment and improved work efficiency Precision-engineered Torx head design ensures accurate fit, prevents slipping, and enhances operational convenience 6.35mm standard shanks compatible with electric screwdrivers, manual screwdrivers, electric drills, and other general tools Specifications: Name: 8PCS hollow bit set Material: Sturdy alloy steel Surface treatment: Sandblasting Handle type: 1/4 hexagonal handle (6.3mm) Length: Approx 200mm / 7.9 inches Sizes: T8, T10, T15, T20, T25, T27, T30, T40 Weight: 285g 7.9" long Torx head screwdriver bit Package Includes: 1 set of 7.9" long Torx head screwdriver bit Note: Due to lighting effects and shooting angles, slight color variations may occur. Please allow 0-1cm measurement deviation due to manual measurement