Socket wrenches are made of high-quality chrome-vanadium steel. The keys are packed in a box made of strong and durable material, which is closed with a clip. The set includes:- 14 1/4 socket size: 4; 4.5; 5; 5.5; 6; 6.5; 7; 7.5; 8; 9; 10; 11; 12; 13 mm- 14 1/4 in socket sizes: 5/32; 3/16; 7/32; 7/3..