4. Brass Knuckles
William Regal brought it back in style, but make no mistake, the brass knucks have been around for a long time in the business.
The absolute best thing about this weapon is that it can be hid anywhere. In a guys' trunks, in his boot, in a hat, anywhere that it's out of sight, and an official would not think to inspect.
Nothing could be quicker and easier than to take out the brass knuckles, slip them on, give a solid right hook, then stash them away again.
It all happens in the blink of an eye, so fast that a referee could legitimately claim he never knew what happened.
Is it a cheap way to get a win? Yes. Is it an effective way to get a win? You better believe it.