The candlestick is a beaten work:

Exodus 37:17 And he made the candlestick of pure gold: of beaten work made he the candlestick; his shaft, and his branch, his bowls, his knops, and his flowers, were of the same

So how does that apply to these candlesticks?

Revelation 1:20d and the seven candlesticks which thou sawest are the seven churches.