Features: 8piece 200mm/7.9 Length torx screwdriver set in the following size: tamper proof torx bits of T8, T10T15, T20, T25, T27, T30, T40 Sturdy alloy steel, which has high hardness up to 60HRC and high torques. Surfaces adopt special anti-rust surfaces treatments, can be used for a long time. The screwdriver drill bit tip has a strong magnetic, which is convenient for adsorbing screws and improving work efficiency The torx head is precise made, the edges can be accurately locked screw, keeping the screws from slipping and making the operation more convenient. 6.35mm standard shanks, suitable for electric screwdriver, manual screwdriver, electric drill, group general tool etc Specifications: Name: 8PCS hollow batch Material: Sturdy Alloy Steel Surfaces treatments: sandblasting Handle type: 1/4 hexagonal handle (6.3mm) Length: approx 200mm/7.9inches Specifications: T8, T10T15 T20, T25, T27, T30, T40 Weight: 285g 7.9" Long Torx Head Screwdriver Bit Package Includes: 1Set 7.9" Long Torx Head Screwdriver Bit note: Due to the problems of lighting effects and shooting angle, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.