1、Small in size and stored in the trunk of the car, you can help yourself or others to change tires at any time 2、Impact pieces are constructed of heavy-duty drop-forged premium chrome vanadium steel to withstand extreme levels of torque changes against fasteners,well suited for compressed air devices and impact wrenches 3、6-point hex socket design prevents round-off deterioration under high torque and hammering stress with use of impact and electric wrenches 4、Highly visible laser-etched markings on corrosion-resistant black phosphate finish makes it easy to identify drive socket sizes, specs, and measurements 5、Sturdy and strong blow molded case features socket size labels for organized storage and is secured by two lever locks The complete set comes with the following pieces: Impact sockets in sizes 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 24 mm ; 1/2' 75mm extension; 1/2' 250mm L shaped socket