The Teng Ball point hex keys are made from chrome vanadium steel for increased strength and durability and are supplied in a folding plastic holder for convenient storage. Each key has a short arm and a long arm. The short arm allows excellent leverage and torque, whilst the longer arm allows access in more difficult to reach areas. In addition the long arms have a ball point head, which permits turning at up to a 30º angle. This Teng Tools 9-piece set of hex keys comprises the following sizes 5/64in, 3/32in, 1/8in, 5/32in, 3/16in, 7/32in, 1/4in, 5/16in and 3/8in.