The metal bond materials may include the powders of Cu, Sn, Fe, Ag, Co, Ni, WC, Mo, graphite, etc.
It just consists of bond materials, and is used to connect the working layer to the body of the diamond tool.
Otherwise, the junction of them will tend to break because of the uneven heat and forces received by the two layers when the diamond tool is in use.
This design can increase the sharpness of the diamond segment, and lower its production cost.
There are mainly two purposes to make these forms: one is to increase the blade's capabilities of containing and discharging sawdust, and improve the cooling and lubricating conditions.
For example, when the material to be cut is soft, the diamonds' size can be big, hardness can be medium, and concentration should be a little bit higher.
This combination can get good cutting efficiency, and at the same time prolong the blade's life.