Springs: 1. It can loosen some stubborn screws on the air filter, on a high-end patchboard, etc. 2. The professional hand screwdriver is made of chrome-vanadium steel and has a higher torsion when used. 3. The design of the shaft corresponds to the ergonomic principle, is easy to use and not easy to tire. 4. The handle is made of PP, non-slip design made of double plastic and is very easy to use. 5. Excellent toughness and toughness. Specification: Material: Chrome vanadium steel + PP Magnetic: Yes Handle length: Approx. 80 mm, size: M1.7 x 50 mm, M2.0 x 50 mm, M2.3 x 50 mm, M2.6 x 50 mm Approximate weight. 179 g Package contains: 1 set x screwdriver (incl. 4 pieces) Note: Only screwdriver type U, no other items included.