10 Unwritten Rules Of Professional Wrestling
9. Everything Is Made Of Steel
The show and matches takes place in a ring, inside an arena. The entire set-up has a lot of movable parts, from the apron to the turnbuckles to the steps and more. There are ladders under the ring, chairs all around ringside and all other sorts of furniture ready to be plundered.
If something is made out of metal, however, it is almost always described as being made out of steel. You've got steel chairs, steel steps, a steel bolt waiting under the turnbuckle pad. This adds extra weight to the pain of being hit by one of these objects, which used to be referred to as 'foreign' objects.
This of course isn't true, as being blasted in the head with steel would almost certainly kill a human being. Don't think about that though, just be impressed at how much steel every wrestling promotion has been able to find.