?Specification?Flap disk diameter: 4.5 Inch, 7/8 Inch Arbor, 60 grits.?High Quality?Angle grinder sanding disc is made of Alumina, durable, good wear resistant, anti-static, anti-clogging.?Semi-open Design?4 1/2 inch grinding wheels include semi-open design to slow loading on aluminum while in use.?Application?4 1/2 inch flap disc 60 grit is designed for grinding, stock removal, edge chamfering/beveling, weld blending, deburring and deflashing, rust removal, blending, cleaning and finishing.?100% Satisfaction Guaranteed?Customer satisfaction is our highest priority, if for any reason you are not completely satisfied with our product we will immediately provide you a full refund (or replace your item).