Professional Long Tamper-Resistant Torx Key - Measurement: T40. -Made of Chrome Vanadium Steel, giving it greater hardness and durability. -It has rounded edges to make it easier to insert the key into the screw. -It can be used for allen / hexagonal screws, suitable for any type of work such as industry, repairs, vehicle workshop, home repairs, etc. -Item known as torx wrench, hexagonal torx wrench, star wrench, star allen wrench.