Hardness scale: HRA, HRB, HRC, HRD HRF, HRG (with standard indenters); HRE, HRH, HRK (with optional indenter).
Stage elevation manual. Load control automatic. Resolution 0.1HR. Tolearance testing.
Set testing times (2~10) to have average value and the difference of max. and min. value
Convert to other Rockwell scales, HV or HB
Memory of 500 testing values for browsing and output
Testing value can be sent to wireless printer automatically
Calibration function compensates the testing value for high accuracy

3M 27313, Ultra Durable 5 inch Power Sanding Discs, Universal Hole, 60 grit, 7100187645, 10 per pack
Dynabrade 95675 1/4" Male Plug with 1/4" NPT Male Thread
Dynabrade 94992 1/4" Male Composite-Style Coupler with 1/4" Male Plug Assembly
3M 65490, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc, DUH580TRI-10T, 5 IN x UH, 80, 7100202914, 10 per pack
3M 65489, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc DUH5120TRI-10I, 5 inch UH, 120, 7100202873, 10 per pack
3M 88904, PSA Cloth Disc 348D, 50 X-weight, 12 in x NH, Die 1200B, 7000118897 