2UUL FM01 Base Tune Double-Sided Metal Polisher

Sandpaper on a soft pad rounds edges and won't give a truly flat surface. The 2UUL FM01 Base Tune is a rigid, double-sided metal plate with abrasive faces for leveling and polishing on the repair bench.

The listing describes a solid, non-warping metal core with two abrasive faces of different grades, a coarser side for removing material and a finer side for finishing. It also says the surfaces resist alcohol, PCB cleaners and flux removers. No dimensions or grit numbers are given.

Jobs the FM01 handles

• Old solder ridges on a stacked-board mid frame.

• Oxidized tin or hardened underfill on top of a chip.

• Burrs on a metal frame edge after a drop.

• A bent frame edge that stops a new screen seating flat.

Working on a flat plate

Clean the part with alcohol first. Hold it flat and use light, even strokes; let the abrasive do the work. Check your progress often, since it's easy to take off too much from a thin frame.

Pair the FM01 with the FM02 TipTune pads for fine polishing of tweezers and soldering tips. Clean the plate after use and store it dry.