Designed for high-performance grinding and finishing, the 4-1/2" Big Cat Abrasive Flap Disc from Weiler is an essential tool for professionals in the fabrication industry. Featuring a phenolic backing and a grit rating of 120, this disc is engineered to produce a consistent finish while conforming to curved and irregular surfaces, making it ideal for use on both steel and stainless steel materials. With a maximum RPM of 12,000 and a thicker disc design that offers 30-40% longer life than standard flap discs, this product is compatible with right angle grinders and is perfect for tackling a variety of applications efficiently. Please note that this product may expose users to chemicals known to the State of California to cause cancer, so proper precautions should be taken during use.