This Cal-Hawk flap disc is a great addition to your metalworking supplies. With a 60 grit aluminum oxide abrasive material, it is perfect for sanding and grinding on your CNC, metalworking, and manufacturing projects. The 4-1/2 inch disc diameter and 7/8 inch center hole size make it easy to attach to your arbor system. This flap disc is made in China and is designed to withstand heavy use. Its oxide formula ensures maximum performance and durability. Whether you're a professional or a DIY enthusiast, this Cal-Hawk flap disc is a must-have for any metalworking project.