Grinding concrete flooring requires the use of smaller manual tools, such as a hand grinder. For aurdus places small electrical or pneumatic devices should be used. The angle grinder, which is intended for grinding the floor, should have sufficiently high engine power, as well as it should be resistant to dust from polished concrete. The angle grinder should be connectable to dust extractor. One of the leading manufacturers of concrete manual grinders is company Flex, which produces devices that meet all the above-mentioned parameters.