Size: 4“,4.5“,5“ etc
Inner hole : 22.23mm /5/8'' -11 M14 thread
Grit: 60#,120#,200#,400#,600#
For metal, glass, stone, concrete, tiles, ceramics Wet/dry Working...
More than 100 times working life compare to traditional Sanding Flap Discs, good heat dissipation