82pcsset Auto Repair Hand ToolsThe screwdriver handle can meet batch head (a word cross T word plum blossom socket head hex extension rod universal joint can receive bending bar) The socket using high quality chrome vanadium steel 50 bv30 cold press forming, torque 50% higher than that of carbon steel, use inferior smooth surface processing, good rust prevention effect Batch head adopts cr v materials, stronger hardness, toughness is higher. Rapid fall off ratchet wrench (positive