These Teng Tools Hex keys with T handles, each have a short arm and a long arm. The short arm allows excellent leverage, allowing easy tightening and loosening. The long arm of the Hex key has a ball point head, which allows a working angle of up to 30 degrees, and therefore improves access. The keys are manufactured from chrome vanadium steel for toughness and durability. This 7 piece set of Teng Tools Hex keys comprises the following sizes: 3 x 100mm Hex Keys: 2.5, 3 and 4mm. 3 x 150mm Hex Keys: 5, 6 and 7mm. 1 x 190mm Hex Key: 8mm. The keys are supplied in a handy storage tray.