... . Features:High quality white hard steel.4 kinds of tip size for different needs: 1.5mm, 2.0mm, 2.5mm, 3.0mm ... to change the tip for use.Suitable for different kinds of RC helicopters, airplanes, cars, boats, etc.Specifications: Material: SteelTip size: 1.5mm, 2 ... free to contact us. 4in1 Hex Screw Driver Tools Set for RC Helicopter Car