Rotorama 4-in-1 Hex Screwdriver is a compact tool for drone building and maintenance that houses four of the most commonly used hex bit sizes in one body: 1.5mm, 2mm, 2.5mm and 3mm. The bits are made of stainless steel and stored in a magazine inside the aluminum handle, so they are always at hand and won’t get lost in a backpack or in the workshop. The bits are held in both the screwdriver and the magazine by a magnet, so changing a bit takes just a moment.