* 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 hexagon socket screw on the tool (except size 2 and 2.5mm)* Special surface treatment of the blades for high corrosion protection and an optimum fit in the screw head.* -01 includes the following: 2.5, 3, 4, 5, 6, 8, 10mm