It's a buffer. I take oil filters that need smoothing and give 'em a quick zap.
6 seconds sound clip from the Tommy Boy (1995) movie soundboard.
You can hear this line at 00:10:12 in the Blu-ray version of the movie.
Quote context
[...]
- What are you doing on the floor?
- I was going crazy on the loading docks, so your dad moved me in here.
- It's a buffer. I take oil filters that need smoothing and give 'em a quick zap.
(Oil filter bouncing in the walls and breaking window)
[...]