What is a MOHS hardness pick set?
While the MOHS Hardness test was developed originally for testing minerals, the same concept can be applied to industrial materials such as concrete. 
Use this kit for “scratch testing” substances to determine their Hardness according to the MOHS Hardness scale, which ranges from 1 to 10, where Diamond is the hardest at 10, while Talc is softest at 1.

Why use a MOHS hardness test?
To determine the hardness of the concrete prior to grinding or polishing…
If you don’t know the hardness of the concrete, you won’t know what bond to use.
A general rule of thumb is soft bond on hard concrete and hard bond on soft concrete.
For example – if you use a soft bond diamond on soft concrete, it will get used up very quickly. 
Or, if you use a hard bond diamond on hard concrete then the machine just skates on the floor and the diamond tools will glaze over.
The solution? Use a MOHS test kit to determine the hardness of the concrete before you begin.

How do you use the hardness picks? 
Simply scratch a smooth surface of your material with the picks of various indicated hardness. (hold the tool in your hand like you would a pen to perform the scratch test.)
As an example, if a No. 5 pick scratches the material, but a No. 4 pick does not, then your material’s hardness is 4.5.

What is included in the MOHS Hardness Test Kit? 

• Four double-ended picks, color-coded, with eight points comprising 2,3,4,5,6,7,8, and 9 on Mohs’ hardness scale, as shown above.
• Two Hardness Plates (of MOHS hardness of 3.5 and 5.5)
• A 100 grit Grinding Stone to keep the points sharp.
• Rugged and compact molded Plastic Case.
• Hardness Table for 80 common Materials.
• Complete Instructions, customized for Industrial applications.
• One year Warranty, and 30 day Money Back Guarantee