This Teng Tools 9-piece set of hex keys comprises the following sizes: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm and 10mm. The 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. Key colour: Black. TEN1479MMA