Dremel 438 sanding band
1/4-inch 120-grit 438 refill, listed for the 430 drum size.
How to choose
The smaller band is a specific match for a quarter-inch carrier. Verify the existing drum before you compare it with a half-inch refill at the same grit.
Compatibility and limits
Quarter-inch 430 drum fit · 120-grit loose bands
Care
Choose the grit for the surface and the amount of material you need to remove. Dremel’s sanding guide separates shaping, smoothing and finishing stages.
Questions before buying
Can I finish a narrow opening without changing to a larger drum?
Keep the same quarter-inch carrier if it already fits the opening. The 438 changes the grit while staying in that diameter. The 770B-01 adds matching carriers and several grits if you need them.