The Wiha SYSTEM 4 SoftFinish Screwdriver Set is a versatile, space-saving interchangeable tool. SYSTEM 4 interchangeable blades are made from high quality chrome-vanadium-molybdenum steel, through hardened with a chrome-plated finish. They can reach lengths between 18-90mm. Thanks to the SYSTEM 4 interchangeable blades, the required blade profile can be quickly and easily inserted and the blade length fixed to requirements. This 12 Piece Set contains the following: 1 x SoftFinish-telescopic Screwdriver Handle. The patented SoftFinish handle ensures work is kind to hands and muscles. Recommended by doctors and therapists at the German Campaign for Healthier Backs. A click-stop ball clamp guarantees a secure hold for blades. Compatible with all Wiha SYSTEM 4 interchangeable blades. 2 x Slotted SYSTEM 4 Interchangeable Blades: 1.5/3.0 x 120mm, 2.0/3.5 x 120mm & 2.5/4.0 x 120mm. 2 x Phillips SYSTEM 4 Interchangeable Blades: PH000/PH00 x 120mm & PH0/PH1 x 120mm. 3 x Ball End Hex SYSTEM 4 Interchangeable Blades: 1.5/1.5 x 120mm, 2.0/2.0 x 120mm & 2.5/2.5 x 120mm. 2 x TORX SYSTEM 4 Interchangeable Blades: T6/T8 x 120mm & T7/T9 x 120mm. 1 x Robust Roll-up Bag, ensures tools are neatly packed away, saving space.