Stair type diamond segment is our new designed segment for grinding concrete floor and terrazzo floor. This shape of diamond segments is usually used for rough/coarse grinding, with a diamond grit of 16# or 30#. We used this segment on concrete grinding disc and concrete grinding wheel for different floor grinders, like Lavina, Husqvarna, etc. We got some good feedback from our customers, which proves that the stair type is good design. This 7 inch concrete grinding wheel is used 5 pieces of stair type diamond segments, for coarse grinding the concrete. The connection can be 22.23mm, M14, and 5/8"-11 and the grinding wheel can be used on different types of grinders. Sunny Superhard Tools provides you with different metal bonds to grind different hardness of concrete. The excellent diamond formula guarantees high performance. 7 inch (180mm) concrete grinding wheel for grinders. Special designed stair type diamond segment for coarse grinding of the concrete. Outstanding performance & superior lifespan. Good packaging & fast delivery. Optional Specifications: Optional size 100mm, 115mm, 125mm, 150mm, 180mm Optional connection 22.23mm, M14, and 5/8"-11 Optional diamond grit 36#, 46#, 60# and others Optional bond type extremely soft, very soft, soft, medium soft, hard, and very hard