<p>PRODUCT PARAMETER: Flap discs are made of premium alumina oxide resin fiber and fiberglass backing plate, high density and abrasion resistant. 10 pack grinding discs of 40# grit, outer diameter is 4.5 inch, 0.87 inch arbor.</p > <p>GOOD COMPATIBILITY: Our flat discs can work with most air and electric grinders and angle grinders at maximum speed of 18000 RPM. The fiberglass backing plate can effectively absorbs vibrations during usage and bring you a stable and efficient grinding experience.</p > <p>GRINDING SPECIALIST: These flap discs are designed for grinding, deburring, cleaning, chamfering, sanding and finishing on various surfaces. Suitable for rust and paint removal, excellent work performance on weld seams.</p > <p>EASY TO USE: Although our product is specialist, user must not be a specialist. This professional flap discs is outstanding wearability and fast polishing, and can provide the biggest surface contact to smooth or bending surface. Not only for professional worker, but also for recruit.</p > <p>SAFETY TIPS: Wear eye protection and gloves before you begin to work. Pay your attention to the spark, do not emit them to tinderbox and someone others. No need to press down too hard to save your labour and it will still work well.</p>