This rotary surface preparation machine is ideal for several different applications including grinding and sanding concrete, removing trowel lines in latex, and removing laitance from freshly poured screed. This helps to speed up the drying process of the screed allowing you to move on to the next stage of the job quicker. This machine can also be used with a dust skirt attachment and dust control vac for near dust-free results. We Stock a Comprehensive Range Of Concrete Grinding Pads Also Grinding Blocks For The STR Machine.