Expert Quality 6 point single hex deep sockets 78mm long. Forged from Chrome Molybdenum Steel with a black phosphate finish for corrosion protection. Hole for accessory spring loaded ball and packed in blow moulded case for protection in transit. Specifications: 3/8" Drive. Deep Sockets Size: 10-11-13-14-17-18-19-21-22-24mm. Single hex 6 point design. Drop forged and heat treated. Black phosphate finish. Professional Quality. Free case to protect the sockets when in transit - case colour may vary.