Very Well. Your power is...
A body of iron: Your body, or any part of it, can be changed to the durability, conductivity and weight of iron at will. You can use your hair as needles and so forth. If reaching a high temperature enough to melt iron, the body will turn into a liquid form. Exposure to higher temperatures results in injury to the body. Depending on how much of the body is changed, it will use up a certain amount of physical energy during the time.
Note: Your aren't actually iron, you just have certain properties of it.