Tianli  HTC Trapezoid 3-Segment Arrow Metal Bond Grinding Block ：Three arrow-shaped segments provide a stable, multi-point grinding action that reduces machine vibration while delivering aggressive cutting power. The sharp arrow tips penetrate hard concrete and thick coatings easily, while the inner V-grooves ensure efficient dust extraction to prevent glazing. Ideal for the first-stage heavy grinding and laitance removal on high-hardness concrete floors.