The Walter Surface Technologies Instant Polish Discs are designed for fast, single-step finishes. These discs are available in 4-1/2" and 5" diameter sizes for use at a maximum 7,300 rpm and optimal 2,000 rpm, and are ideal for automotive, transportation, food and beverage equipment, aerospace, and other sector-specific applications. With powerful polishing properties and improved engineering, these discs can achieve No. 8 mirror finishes in a single step, according to the company.