... .Grit: #6, #16, #40, #80, #150 Concrete floor grinder1. Applications: To remove all types of stubborn coatings, such as paint varnish, glue, epoxy ... for the toughest situations, such as the removal of persistent coatings. 3. Grit: #6, #16, #40, #80, #1504. Velcro backer Concrete floor grinder