S1LVERFOX Tire Truing Stick. GREAT for rounding edges on tires. This stick has 2 sides with different grid sanding paper. No more wore out finger nail file and having to press super hard to round your tires.
Dim: 5 x 1/2 x 1/8
This trick stick will do the job for you. This is constructed with alum handle. The sand paper mounted, L 1-3/4 x W 1/2 long. 2 grit sided tool. Comes with 2 extra paper for regluing when needed.