Features: Engineered with sintered diamonds segments and reinforced metal matrices, this 100mm grinding disc delivers long lifespans for aggressive concrete floor grinding across 50~300 grit options. Universal 4 inch interface ensures compatibility with most grinders, while vibration dampening design maintains 75dB operations for reduced noise pollution during epoxy floor preparation. Professional contractors and DIY enthusiasts benefits from its rapid swaps system, completing tool changes in 3 second for uninterrupted workflow in commercial or residential projects. Tackle demanding surfaces from coarse concrete leveling to fine stone polishing in city renovations, workshops, or retail spaces requiring OSHA compliant slip resistant finishes. Multiple surfaces versatility extends beyond concrete to terrazzo, tile adhesives, and natural stone, with diamonds embedded block maintaining consistent abrasion for flawlessly smooth substrates. Specifications: Material: Diamonds Size: Approx.10x10cm/3.93x3.93inches Granularity: 50/80/120/150/200/3009Optional) Package Includes: 1Pc Four Teeth And Five Hole Polishing Sheet note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item.