Mini rounded block sanders
thingiverse
These are three sanding blocks made for sanding in different sized rounded grooves. 1. 3mm on one side and 6mm on the other side with a flat bottom. 2. 12mm on one side and 19mm on the other side with a flat bottom. 3. Corner edge on one side and 25mm on the other side with a flat bottom. You'll need 3 (5mm brass nut inserts) and 3 (5mm hex screws 20mm in length).
Download Model from thingiverse
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