ITEM NAME:Metal Hex Key Socket Screw Drivers Wrench for RC Models 4.0mm 5.5mm 7.0mm 8 P7G2 Metal Hex Key Socket Screw Drivers Wrench for RC Models 4.0mm 5.5mm 7.0mm 8 P7G2 Screw Driver Used for helicopters, airplanes, cars, boats, particularly 450 Helicopters/ESKY CP V2 King 3. Material: Aluminum alloy + Steel Color: Black + Silver Length of cutting head: 8.5cm / 3.3in Length of handle: 9cm / 3.5in Total length: 17.5cm / 6.9in Package List: 1 x 4.0mm Hex key Socket Screw Driver Wrench 1 x 5.5mm Hex key Socket Screw Driver Wrench 1 x 7.0mm Hex key Socket Screw Driver Wrench 1 x 8.0mm Hex key Socket Screw Driver Wrench Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..1 x 4.0mm Hex key Socket Screw Driver Wrench. 1 x 5.5mm Hex key Socket Screw Driver Wrench. 1 x 7.0mm Hex key Socket Screw Driver Wrench. 1 x 8.0mm Hex key Socket Screw Driver Wrench. Screw Driver. Material: Aluminum alloy + Steel.