- T-handle screwdriver: Shape to allow high torque transmission in difficult tightening and loosening situations. - The ergonomic shape of the handle fills the palm of the hand well, the fingers lie safely in the soft rounded handle recesses. - The whole hand makes contact with the handle and friction losses between the hand and the handle are avoided. - Holding function (HF) to securely hold the TORX screw on the tool. - Special surface treatment of the blades for high corrosion protection and an optimum fit in the screw head.