Impact Wrench Cordless

impact wrench
A wrench, usually powered by electricity or air, in which repeated blows from little hammers are used to generate torque to tighten fasteners. The torque applied to the fastener depends upon the time and the air pressure applied to the tool (for pneumatic wrenches).
An impact wrench (also known as an impactor, air wrench, air gun, rattle gun, torque gun) is a socket wrench power tool designed to deliver high torque output with minimal exertion by the user, by storing energy in a rotating mass, then delivering it suddenly to the output shaft.
A power tool used to tighten nuts or bolts.

cordless
(of an electrical appliance or telephone) Working without connection to a main supply or central unit
A type of phone where the handset is not connected to a device by a cord, allowing the user to move about while placing or receiving a call.
The term cordless literally means without a cord and is generally used to refer to electrical or electronic devices that are powered by a battery or battery pack and can operate without a power cord or cable attached to a fixed electricity supply such as an outlet, generator, or other
not having a cord; "cordless telephone"