Review on 7" Diamond Grinding Wheels For Concrete Or Masonry, 24 Turbo Segments, 30/40 Grit, Medium Bond, 5/8"-11 Arbor by Jon Bishop

Used to grind drainage channels where bird baths had been left during finishing. needed to take an 1/8 to 3/16 inch off the concrete in small channelsso it would drain off after rainstorms. Was a suprizaly quik job. Was very satisfied with the $1/2 inch grinding wheel. used a very inexpensive grinder from harbor freight to do the job