Package includes: 1/2" drive socket set: 5, 6, 7, 8, 10, 12, 14, 16, 17, 18, 19, 22mm; 1 x plastic case. Premium materials: The hex socket wrench set is made of high quality chrome vanadium steel with high gloss polishing, provides greater strength and torque. Material: The ratchet Allen key set is made of chrome vanadium steel, durable and not easy to rust, reduce wear, protect the fastener. Usage: For changing nuts, e.g. wheel bearing / Tighten a screw Easy storage: Each hex socket set contains a sturdy blow molded case for convenient storage when not in use. They are stamped with the sizes appropriate, so you can easily identify the socket you need.