A flail!
http://en.wikipedia.org/wiki/Flail_(weapon)
the hammer throw
It is just called a Ball and Chain. When used in a cannon (good against rigging and sails) it is Chain Shot. "Bolas" might be what you are thinking of.
A mace looks like a handle that has a chain and at the top there is a ball thus with spikes
This is called a jump serve.
cut the right chain on the grey ballwhen it's over the cannon cut the left chaincut the chain connected to green ball farthest to the rightcut the chain connected to the red ballcut the chain to the remaining green ball
A Mace Flail.
The metal ball with spikes you are referring to is likely a medieval weapon called a morning star. Also known as a mace, it was used by knights and soldiers to crush armor and injure opponents in combat. The spikes were designed to penetrate armor and inflict damage upon impact.
That would be called the spindle.
It is a club with a short chain and a large iron ball with spikes. It was designed to go over a shield and hit the person behind it.
it is called an over hand
Terminated 1.Bring to an end,"He was advised to terminate the contract." 2. (of a thing) Have it's end at (a specified place) on of (a specified from) :"the chain terminated in a ball covered with spikes."
A ball and chain is a heavy iron ball attached to a prisoner's leg by a chain as a means of restraint.