Stanley Essential Screwdrivers have bars made from Chrome Vanadium Steel, which resists bending & snapping. The handles are made from Polypropylene, with TPR overlay for increased comfort & reduced fatigue. Increased torque can be applied by using another bar through the hole at the top of each handle. This set of 6 contains the following: 6 x TORX: TX10 x 100mm, TX15 x 100mm, TX20 x 100, TX25 x 100mm, TX30 x 150mm & TX40 x 150mm.