The WEN 2305 Rotary Tool Kit with Flex Shaft is a powerful corded electric tool kit that includes a lithium-ion battery, providing a maximum speed of 30,000 RPM and a minimum speed of 8,000 RPM. This blue tool kit features variable speed controls and a keyless chuck for easy bit changes. With a 1-year manufacturer warranty, this rotary tool kit is designed for precision and versatility in various home and workshop projects. Made in the United States, this tool kit weighs 3.6 pounds and is equipped with a flex shaft for added flexibility and control.