- Introducing the CIW 21B – a revolutionary tool that empowers you to tackle fastening and loosening tasks with speed and efficiency. With its powerful 21V battery, this impact wrench delivers remarkable torque and a variable speed of 0-3300 revolutions per minute (rpm), allowing you to effortlessly drive or remove bolts, nuts, and fasteners. The cordless design provides the freedom to work in tight spaces and remote locations without the constraints of cords or outlets. The ergonomic grip ensures comfortable operation, while the adjustable speed settings enable you to adapt to different applications with precision. It also comes with a long-lasting battery life and rapid charging capabilities.