This teng tools 9 piece set of hex keys comprises the following sizes15mm 2mm 25mm 3mm 4mm 5mm 6mm 8mm 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