The type of abrasive in the structure of the disc, the size of the sand, the hardness of the disc, its texture (the spaces between the sand and the binder) and the binder used are the materials that make up the property of the disc.

FIREFLEX indicates these dimensions on their labels with the following group of signs.

The marks only show the construction features of the disc. They are not a measure of the use and working efficiency of the disc.

Even if different producers use the same marks on their disc, it is not possible to get the same result from these discs.

The discs of FIREFLEX with the same labels give stable and regular results under the same working conditions.

FIREFLEX recommends not to use stones with unclear properties, with torn, worn, dropped or illegible stones. If it is necessary to use it, it recommends using the disc at the lowest speed.