For grinding concrete floors, there are lots of different brands of floor grinders in the world, like HTC, Lavina, Klindex, etc. Sunny developed various kinds of concrete grinding discs to suit different types of floor grinders. The trapezoid concrete grinding disc on this page is designed to be used on PHX floor grinders of Canada. We welded 1 diamond segment bar on the steel body, and you can choose the diamond grit from a wide range of 6#, 16#, 36#, 60#, 80#, 120#, 180#, and 220#. Each floor is different. Sunny provides different high-quality bonds to fit different floors. With a unique quick-change system, this tool can be installed very quickly. Specially designed to be used on PHX floor grinders Excellent diamond segment bar High performance & long lifespan A wide range of diamond grit to choose from The different hardness of bonds apply to different concrete floors The Holder Plate of PHX Floor Grinders Picture of Holder Plate Model Number Grinding Disc Quantities PHX D28PHX D21PHX 21 3 plates × 3 pieces = 9 pieces PHX 12 1 plate × 4 pieces = 4 pieces   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.