High corrosion resistance, the tip is hardened by an advanced heat treatment for enhanced durability.Material: S2 steelDimensions: about 6.35 x 150 mmQuantity: 8 per set (T8: 3.5mm, T15: 4.5mm, T10: 4.0mm, T20: 5mm, T25: 5.5mm, T27: 6mm, T30: 6mm, T40: 6.4mm)S2 steel is hard, good workmanship, and high precisionThe magnetic headbands installed in batches can easily hold the screwsWide range of applications, electric screwdrivers, manual screwdrivers, drill bits and other wind-approved tools are suitable for operating electronic equipment, very suitable for electricians, mechanics and maintenance workPackage Included:8 x Torx screwdriver bit setnotes:Due to manual measurement, please allow an error of 1-5mmThe color of the item shown in the photo may show a slight difference on the monitor because the monitor is not calibrated the same