Designed for the same purpose of the 300 pad the 8530 pad is a step ahead. Already made with a dense foam for longer durability the 8530 pad is only 1" helping to get in tighter areas. Devised with a curve to help the cooling by naturally keeping your pad at a 10 degree angle. velcro backing for quick and easy pad replacement. The 8530 pad is perfect for medium and light paint correction jobs or just polishing the swirls on your car out on a Saturday morning. This curved pad with the right Walt's product will help eliminate any swirls or webbing imperfections left in paint. The 853 pad is great for compounds, cleaners, glazes, and pre-waxes. but still soft enough for one step finishes..