This is an extension for the drill I also use. It's used for narrow spaces and gaps where a drill won't fit. When you hold the black outer part, only the inside rotates, and the tip spins. I wonder what the mechanism is, haha. I've also included a sample of the one I use. ^_^ Drill bits are not included! It bends 360 degrees, so it will be folded to fit in an envelope for shipping. I also have various other miscellaneous goods for sale, so please take a look below. #KoalaGoods #FlexibleDrill #FlexibleScrewdriver #Screwdriver #FlexibleBit #DrillBit Flexible Drill, Flexible Screwdriver, Screwdriver, Flexible Bit, Drill Bit