You may also like. 9Pcs Trapezoid Concrete Floor Grinder Grinding Pad Polisher Metal Bond Grit 100. Z-LION trapezoid metal bond pad specially designed for medium hardness concrete grinding and polishing. The trapezoid pad design for removing adhesives, thin mil coatings and leveling uneven spots. The Trapezoid is a very aggressive segment that easily attaches to the segment plate. Double Z segments with coarse grit diamonds provide aggressive grinding and stock removal. Achieve maximum square footage at minimum cost.