For diamond grinding block, we totally get two kinds: resin bond diamond block and metal bond diamond block. They are installed on the automatic stone grinding machine for the coarse grinding and fine polishing of natural stone, synthetic stone, porcelain etc. Metal bond diamond block is mainly used for coarse grinding whose grit is from 46#-400#. And resin bond one is used for fine grinding whose grit is from 100#--3000#. Also we get hand use diamond block for satisfy different customer's need.