For the metal bonded diamond grinding disc, there are lots of different shapes. The most common shapes are rectangle shape, arrow shape, and round shape. Arrow shape can be used for coarse grinding or thin coating removals. Rectangle shape can be used for medium grinding. The round shape can be used for fine grinding. This "Wong" shape diamond segment is one of our new designed segments. We called it "Wong shape" because it looks like the Chinese character "王", which means king in English. From the appearance, it looks like the segment bar, but with 2 concaves on each size, which reduces the contact area between the segment and concrete floor and improves the sharpness. It can be used for both coarse grinding and medium grinding. Sunny Superhard Tools can provide all kinds of excellent diamond grinding discs for concrete grinding. This htc diamond grinding disc is designed with 2 "wong" type diamond segments, and it has the following features: New designed "wong" type diamond segment improves the sharpness. High performance for coarse grinding and medium grinding. HTC quick-change type for easy installation. Different types of metal bond for different hardness of concrete. Optional Specifications Optional Diamond Grit 6#, 16#, 36#, 60#, 80#, 120#, 180#, 220# Optional Metal Bond extremely soft, very soft, soft, medium soft, hard, and very hard Optional Packaging 6 or 9 pieces per box Optional Painting Color High light or Matt, common colors are: orange, yellow, red, black, purple and blue Other services OEM/ODM service is available, such as logo engraving(free), painting color(free), and etc. "Wang Type" diamond segmentSYF-B18