GRADE
 

GRIT  
 

NUMBER  
 

BASIC
APPLICATION

Extra Fine

150
120

4/0
3/0

Very fine finish sanding

Fine

100
80

2/0
0

Finish sanding.
Prep floor for first coat
of stain/sealer.

Medium

60
50

1/2
1

Intermediate sanding.
Removing scratches
left by primary step.

Coarse

40
36
30

1-1/2
2
2-1/2

Rough sanding.
Smoothing or leveling floors.

Extra Coarse
 

24
20
16
12
 

3
3-1/2
4
4-1/2
 

Heavy sanding.
Removing old coatings.