Grinder Power Tool

power tool
a tool driven by a motor
A power tool is a tool powered by an electric motor, a compressed air motor, an internal combustion engine, direct burning of fuels and propellants, or even natural power sources like wind or moving water.

grinder
A person employed to grind cutlery, tools, or cereals
A molar tooth
A machine used for grinding something
molar: grinding tooth with a broad crown; located behind the premolars
bomber: a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
mill: machinery that processes materials by grinding or crushing