| Material to be measured | Steel and metals which can be measured with hardness standard block made of the material |
| Size of material to be measured | Bigger than 15mm x 15mm , thicker than 6mm |
| Critical curvature | Shaft/ pipe OD: bigger than 10mm Ball radius: bigger than 20mm (At use of standard attachment) |
| Surface roughness | Under Ra1.6μm |
