This Ryobi RPS18-0 18V ONE+ Cordless Corner Palm Sander is a versatile and powerful tool that is perfect for all your sanding needs. With its rotary/circular action, it is ideal for smoothing out rough edges and corners, and its lithium-ion battery ensures that it can run for a long time without needing to be recharged. The sander is compatible with Ryobi's ONE+ battery system, which means that it can be used with a variety of different tools and batteries. It is a bare tool, which means that it does not come with a battery or charger, but this allows you to customize your tool collection to your specific needs. Whether you are a DIY enthusiast or a professional, this Ryobi palm sander is an essential addition to your toolkit.