The 8G813V40358 is a Dremel cordless rotary tool. It has a 7.2V lithium-ion battery, a variable speed of 5,000 to 33,000 RPM, and up to 40 minutes of run time. It is designed with a compact and lightweight body, making it easy to handle and control with precision. The rotary tool comes with a power engraving, grinding, and sharpening tool as well as a 20-piece accessory kit. The variable speed settings allow users to match their project’s material and requirements, while the interchangeable accessories offer a variety of options for custom work.