USEIt can solve some stubborn screws on air filters, some high-end patch panels, etc. FEATURESThe professional hand screwdriver is made of chrome steel- vanadium, which strengthens the torsion when using. DESIGNRod style design conforms to the ergonomic principle, easy to use, not easy to fatigue. HARDNESSThe handle is made of PP, double plastic non-slip design, very comfortable to use.Excellent hardness and toughness. SpecificationsMaterial: chrome vanadium steel and PP Magnetic: yes Handle length: approx. 80mm or 3.15 inch Size: M1.7 x 50mm, M2.0 x 50mm, M2.3 x 50mm, M2.6 x 50mm Product Features product: It can solve some stubborn screws on air filters, some high-end patch panels, etc. The professional hand screwdriver is made of chrome steel- vanadium, which strengthens the torsion when using. Rod style design conforms to the ergonomic principle, easy to use, not easy to fatigue. The handle is made of PP, double plastic non-slip design, very comfortable to use. Excellent hardness and hardness. Package included: 1 set x screwdriver (4 pieces) Note: Only U-type screwdrivers, no other things included.