Precisely-sized, chamfered ends insert smoothly into fastener head, reducing wear. Hinged case opens flat, making it easier to get wrenches in and out. Extra-long arm allows extra torque to be applied to the fixing. Both ends of each wrench comes with security. The exceptionally sturdy socket walls prevents stripping and adds extra grip under most torquing conditions. The L-Shape design on one end provides for the ability to use a torque bar to obtain specifically desired torque settings. Torx hex key wrench set are commonly used in automobiles, motorcycles, bicycle brake system, hard disk drives, garage, furniture, home, computer systems and consumer electronics and more.