A tong is an application/mechanism based on a lever (Class 3 lever). Similarly, window blinds operate using a cord-and-pulley mechanism. Tweezers, nut crackers, and see-saws are all types of levers.

Pattern analysis:
First letter advances by +1: $\text{S} \rightarrow \text{T} \rightarrow \text{U} \rightarrow \mathbf{V} \rightarrow \text{W}$
Second and third letters are consecutive alphabetical pairs advancing by +2: $\text{CD} \rightarrow \text{EF} \rightarrow \text{GH} \rightarrow \mathbf{IJ} \rightarrow \text{KL}$

Looking at the right end of the sequence: S # P U 5.
# is a symbol followed by consonant P. As per the rule, the symbol and consonant interchange positions, so # P becomes P #.
The end of the sequence becomes: ... S P # U 5.
Counting from the right end:
1st from right = 5
2nd from right = U
3rd from right = #.