Micro-Flat Datums Pvt. Ltd. Offers Waterless Granite Surface Cleaner. Micro-Flat Datums Pvt. Ltd. Is an ISO 9001:2000 registered company. Waterless Granite Surface Cleaner is extensively used for accurate hand-lapping of ferrous and non-ferrous parts to obtain a perfect surface form/flatness. Waterless Granite Surface Cleaner is an ideal attachment, which is to be used along cast iron / granite base inspection bench centers / T-slotted surface plates for checking concentricity of stepped and hollow shafts and spindles.