I believe it is specifically a betel nut cracker.
Examples
I actually had a 25-year flashback to my father's Indian office colleague using one to prepare betel nut, leaf, and spices for chewing. Seemingly every minute or so.
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@TvH started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
TvH
I believe it is specifically a betel nut cracker.
Examples
I actually had a 25-year flashback to my father's Indian office colleague using one to prepare betel nut, leaf, and spices for chewing. Seemingly every minute or so.