Amartisan 12-Piece Torx Bit Set, S2 Steel, 4" Long T5 - T40,

S2 Material Forging：The drill bit is made of high quality S2 alloy steel ,with sturdy hardened & tempered construction. 4 Inch: 12 Pack Tamper Resistant star bits T-5, T-6, T-7, T-8, T-9, T-10, T-15, T-20, T-25, T-27, T-30, T-40 (T5 and T6 are not tamper proof security bits).. Magnetic Impact: Strengthened magnetic impact torx bits helps you easy pick up screws. The magnetism doesn’t decay after multiple uses. Wide Range of Uses: Used in automobiles, repairs, trucks, automobiles, engines, motorcycles, interiors, dashboards, computers, cable boxes, toys, appliances and consumer electronics, drill bits can also be used in many other protected parts. General tools: The 1/4" hex handle can be used with electric screwdrivers, hand screwdrivers, electric drills, combination general purpose tools and any standard drill.