They are foam backed for polishing on the surface of marble, granite, ceramics, glass and hard composites. Flat pads are for for polishing plane and the Profile Pads are allowed for easy polishing the profile shapes or the areas that are hard to polishing by machines. They are good at edging or seaming polishing.
For the coarser grit pads are electroplated diamond on flexible cloth and foam-backed, available in the grits# 60, #120, #200 and #400.
For the finer grits, they are resined diamond on flexible cloth and foam-backed available in the grit #600, #1800 and #3500.