The level of hardness of an abrasive tool depends on the strength used by the binding to keep the abrasive grains on the tool's surface.
Hardness depends on:

• binding quantity
• type of binding
• structure (porosity) of the abrasive tool
• type of the used tool

The level of hardness is classified by alphabetic characters:
Hardness:

Very soft	Soft	Medium	Hard	Very hard
D	H	L	P	T
E	I	M	Q	U
F	J	N	R	V
G	K	O	S

Our technical office is available for further information and details