An 18th Century Wick Trimmer

A candle wick trimmer was a scissors-like instrument for cutting and arranging
candlewicks.
Candlelight would fade after 10 minutes (or a bit longer if the candles were of
high quality), and emit a lot of smoke. In order to revive the flame the tip of the
wick had to be cut periodically.
Trimmers were used from the mid-15th century.