Heavy duty steel tips Made of aluminum alloy + steel material, resistant to stripping breakage. Package includes 1 x 4.0mm hex driver, 1 x 4.0mm hex driver 5.5mm, 1 x 7.0mm Hex Driver, 1 x 8.0mm Hex Driver. Nut Driver Set Length Handle Length: 9cm/3.5inch; Total length: 17.5cm/6.9inch; Cutting head length: 8.5cm / 3.3inch. More FPV Series Products Supplied by Hobby-Ace on Amazon.Bring your eyes to the sky and race like a free bird, enjoy the fun of the game. ultimate first person viewing experience. Hex Nut Drivers used to disassemble RC Helicopters, Airplanes, Cars, Boats, especially 450 Helicopters / ESKY CP V2 King 3. Number of sends: 4 pcs.