Name: Concrete floor grinding andpolishing machineFeature:1.This grinding and polishing machine,alterable frequency and speed,folding handle and the height of handle is adjustable.2.It can grind ,polish and crystallize granite,marble,terrrazzo,concrete.stone and clean the floor,etc.3.Grind quickly with three plates,convenient to operate4.Strong,durable,high precision,long life with various polishing pads for replacing.5.It can also grind and polish new and existing concrete floor,remove soft and hard coatings.6.It's for dry and wet use,optional grinding or polishing pads.