They are made from an element called Dalekanium. Which is a fictional metal which is very, very touch.
"MY CASING IS MUCH MORE STRONGER AND MORE VALUBLE!"

Actually, they've listed two metals: Dalekanium and Dalekenium. Dalekenium is a metal they mined in the episode "The Dalek Invasion of Earth."

Trust me... the maces can smash seemingly "indestructible." :P

I don't really care. I still win.

Yes also there's a forcefield in place over the casings.

Yeah, your mace would be destroyed. :P

True, true! Good spot!

Thanks. Max, you are screwed.

They go through forcefields. So they're intact.:P

Max, whatever you can come up with, we still win. I'm sorry, I really am. But there it is. :P

I know three words Max could try: Base Delta Zero :D

And I've got four more: I Don't Get It. :P

Melting a planet. :p

The Daleks had a plan to remove the core of Earth once and replace it with a giant engine so they could turn the planet into a moveable base.

Yeah Danny BDZing the planet would work. An endless volley of Turbolasers from several Imperial ships which literally turns the surface into molten lava and makes the planet uninhabitable for atleast 4 decades.

Uh-huh... *slowly backs away, whistling*

Even if Daleks on the surface survived theyd sink into the planet and keep submerging until the surface solidify again and they'll be eternally trapped underneath the surface and will eventually be crushed.

And then melted. that is a point. And if they had a Death Star that would do much worse.

Hey, which side are you on, Chris? :P

*gives Chris a medal and $50,000* :P