I will be testing on my pair of Skullcandies which the had strap broke, but i still use it.
Heaphones (optional..... xD just kidding)
Phillips Screw Driver
Flat Head Screw Driver
Step 1: Labotimizing your headphones...
First, use whatever you need to open up you headphone casings so you get access to the element.
The screws for this pair was under the ear cushions.