According to HorneTD :

A two pole switch is similar in appearance to a "light switch" but it
has four screw terminals rather than two. A common single pole switch
can open and close one conductor, a two pole can control two conductors,
a three pole three conductors and so on. The code does allow you to use
two single pole toggle switches for that purpose but a two pole switch
would be best practice because it permits you to deenergize the entire
garage with one switch rather than two.

CAREFUL! If the OP walks into a electrical store and buys the first
four screw terminal switch he sees, he'll end up with a 4-way lighting
switch. That would likely dead short the circuit - kaboom!

He needs to make absolutely certain that the switch is described
as two pole. A two pole switch may have more than four terminals
(ie: a DPDT has six, a DP3T has 8 etc), but he only needs four.

Electrical wiring duty units will usually only have four.

[The switch terminology clash between the electrical and electronic
industry is _extremely_ annoying. An ordinary 2-way switch
is SPST (or 1P1T). 3-way is SPDT (aka 1P2T). A regular 4-way isn't
describable that simply. In the electronic trade it'd be described
as, I think, a "2 pole reversing switch".]
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.