Works on Materials: Quartzite, Granite, Quartz, Ultra-Compact, Concrete
Used Wet or Dry
Other Features: 
Extremely aggressive grinding speed
Special formula and round edge has great performance for most stone and ceramic materials
Not great for flat surface
#30 to #200 grit covers various surface roughness
Round edge of wheel is very good for tight radius grinding
Aluminum body with rubber eliminate the vibration
5/8-11 Thread / M-14 available