Foot Pro 100 Grit Zirconia, 6" Expander Wheel Belt. per belt or by the box (10 in a box)
Zirconium OXIDE - More durable, good for shoe and heavy grinding
A particulate material that gives better life than straight AO, working well for general purpose grinding of many types of material. Often has coolant coating such as with 3M 577 or 877 belt series.