7 pieces means 7 Step Include Grit 50#, 100#, 200#,400#, 800#, 1500#, 3000#

8 pieces means 7 Step and Backer Include Grit 50#, 100#, 200#, 400#, 800#, 1500#, 3000# + 1 Backer Pad

Thickness: 3mm

Size: 5cm (2 inch)

Usage: Marble, granite special shaped processing, concrete wet polishing.

Feature:

1.Excellent clarity, gloss, soft degree.

2.Does not change in the color of the stone itself, with glazing fast, good brightness and not fade.

3.High diamond content, cut fast and aggressively. 

Application:

Used for  repairing and renovating marble, concrete, cement floor, terrazzo, artificial stone.