Tianli Twin-Rectangular Segment Metal Bond Grinding Block for HTC：Primary heavy-duty grinding tool designed for stripping thick epoxy/polyurethane coatings and removing laitance from high-hardness concrete floors. it provides exceptional wear resistance and aggressive cutting power, making it ideal for opening up concrete surfaces during the first stage of floor renovation. The rectangular segments ensure stable grinding action. Must be followed by finer resin pads for final polishing.