Erwin's diamond set

World Cup serviceman Erwin wasn't entirely satisfied with the diamond stone options on the market, so he decided to make his own set. This set, consisting of 4 stones ranging from 200 to 1000 grit, is CNC milled from high-quality aluminum, resulting in a very precise finish. The high-quality material provides extra weight, making the stones comfortable to hold.

If the diamonds wear out, the diamond structure can be replaced separately.

The set of 4 diamonds comes in a handy storage box.