CMD1571525 14 Piece L Shape Torx Key Set. L-shaped Torx key set is ready to go for almost any Torx screw application. With duel ends supplying conventional Torx heads on one end of the key and tamper-proof Torx at the other, the set is ideal for both common and specialist applications. TORX is a type of screw head with a six-point star intrusion, designed to ensure even more torque can be applied for ease and precision when tightening and loosening. They are often used in mechanical production, for example. The tamper-proof Torx screw is ideal for when added security is needed, as it cannot be undone by conventional tools.