4-in-1 Hexagonal Screwdrivers Tool kit for RC Helicopter Repair 1.5mm / 2.0mm / 2.5mm / 3.0mm Color:Black + Silver + Brown Material:Steel Compatible Models:R/C airplane Application:Used for disassemble Hex Screw in helicopter and other parts Tip size:1.5mm, 2.0mm, 2.5mm, 3.0mm.