Engineered for optimal performance, the Maxidisc™ Aluminum Oxide Premium flap disc is specifically designed for working with soft non-ferrous metals such as aluminum, copper, brass, and bronze. With a diameter of 4-1/2 inches and a 7/8-inch arbor bore, this Type 27 disc boasts a grit rating of 36, ensuring efficient material removal while maintaining a longer lifespan—up to twice that of traditional flap discs. Each box contains ten discs, each capable of operating at a maximum RPM of 13,300, making it a cost-effective choice for high production rates in metalworking applications. Whether you're a professional fabricator or a DIY enthusiast, this premium tooling series offers the durability and performance you need for your projects.