8'' inch - 200mm diamond grinding discs, polishing pads or other tools.
[2nd step] 10'' Metal Bond Diamond Granite Slabs Grinding Disc | 250mm grit 200# granite abrasive wheel | 12 segments iron base .
please click to see " 6 steps to polish stone slabs " : http://www.ncctecshop.com/1st-step-8-diamond-stone-slabs-grinding-disc-200mm-granite-abrasive-wheels-plate-12-segments-iron-base-grit-50-p-258.html