...is using a bar mat when taking apart things with tiny parts.
The nubs making picking up small parts with your fingers easier, or if micro small, easier to pick up with tweezers or even a wooden toothpick or dental tool as the nubs will keep you from having to chase after things that want to roll away.
The nubs hold things in place.
The nubs keep the work above any puddles of solvents or lubricants, keeping the work cleaner.
AND they're dirt cheap.
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