Wet or Dry Grinding, For grinding concrete, Brick,hard stone granite, marble ect. Spiral Turbo design of segments and very coarse diamond grain provide very high efficiency, very fast grinding speed. If you need better finshing, please choose cup wheel with finer diamond grain Great choice for grinding and removing heavy stock and shaping the material Can be used on most angle grinder or grinder machine Specification: Diameter 4"/100MM, 4.5"/115mm, 5"/125mm, 7"/180mm, M14 or 5/8-11 Thread, Diamond height 5MM, Diamond Grits #30/40 ATTENTION: 5/8-11 thread is more popular in America Area. <><><><><><><><><><><><><><><><><>end<><><><><><><><><><><><><><><><>