Adjustable Impact Wrench

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.

adjustable
Able to be adjusted
capable of being changed so as to match or fit; "adjustable seat belts"
(Adjustability) how well you can adjust the nappy or wrap to fit your baby. A good fit is vital to achieve maximum containment, especially in a newborn, breastfed baby.
(Adjustables) Fixtures that can be adjusted or aimed for accent and directional lighting requirements.