PIXNOR 4pcs Metal Hexagonal Hex Screw Driver Screwdrivers Tools Kit 1.5mm 2.0mm 2.5mm 3.0mm for RC Helicopter (Blue) Color: mainly blue. Material: durable hard aluminum alloy and steel. 4pcs different head sizes: 1.5mm, 2.0mm, 2.5mm, 3.0mm. Each total length: about 195mm. Handle (Length*Diameter): about 90*18mm. Ideal for easily disassembling hex screws in RC helicopter or other places. Simple and practical design, comfortable to grip and easy to use.