A curling iron, a flat iron, a bubble wand, another curling iron. If these are the contents of your hair appliance arsenal, chances are you're probably short on space in your batroom cabinet. 

So why are they all necessary, and what's more, what do they even do?

When it comes to adding or removing curl from your hair, there's a tool for that. Here are just a few.

INTERCHANGEABLE BARREL CURLING IRON: Instead of buying four different curling irons with four different sized barrels, why not save some space and opt for one with interchangeable barrels? The smaller barrel offers tighter curl, and a larger barrel creates larger, loose waves.

4P Interchageable Barrel Curler Set, Sephora

FLAT IRON: Its obvious use is to straighten hair, but did you know you can also use most flat irons to curl hair, too? With the right technique, a flat iron with narrow plates can also double as a handy curling and waving iron. For a brief how-to, click here.

CHI Deep Brilliance 1" Digital Titanium Iron, Got Beauty

BUBBLE WAND: If it's beachy, tousled waves you're after, this handy tool may be the one for you. Wrap hair around the "bubbles" for effortless looking waves, or wrap hair between each bubble for tighter spirals. For a tutorial, see our previous how-to with Megan Moore, here.

Bed Head Rock 'N Roller Bubble Curling Iron Wand, Ulta

HOT ROLLERS: Roll 'em up and let 'em sit while you apply your makeup. Take them out when you're made-up, and voila. Curls for days, simple as that.

Babyliss Pro Ceramic Hair Setter, set of 12, Got Beauty