Features Hard Diamond: The Abrasive Block Is Made of Excellent Diamond Material with Smooth Surface And High Hardness Appearance Type: Diamond Grinding Shoes Are Fan Shaped 3 Cylinder Teeth, with 9mm Through Holes, Tool Head Is 10mm High, Grit Number Is 30 Wear Resistant And Low Noise: Diamond Grinding Shoes Are Produced By Exquisite Technology, Which Is Incisive, Wear Resistant, Durable, Possess Long Service Life, with High Grinding Performance, Low Noise, Stable Structure And Excellent Performance High Work Efficiency: The Concrete Disc Saves Time And Effort, And Is of Great Help to Industry And Daily Life Wide Applicable: Coating Disc Shoe Is Suitable for All Concrete Grinding Machines with High Grinding Efficiency And Is An Important Hardware Grinding Fittings Specification: Item Type: Diamond Grinding Shoes Material: Diamond and alloy steel Use: Uneven ground grinding, floor paint grinding, concrete polishing, floor paint removal, etc. Model: Black grit 30 Through Hole: Approx. 9mm / 0.35in Tool Head Height: Approx. 10mm / 0.39in Package List: 3 x Diamond Grinding Block Package List 3 x Diamond Grinding Block