The second level is only 3" ... your wheels should lift on the first level before the spoiler hits the third step which is 4.5" high.

 

It's an oil filter wrench ... the best type I use. Works great for loosening those tight OEM filters.

 

If you go to searching for them on Google, you might want to call them
'Oil Filter Pliers' in order to find them...
Channel Lock Oil Filter Pliers - $12
https://mustangforums.com/forum/2005...rong-spot.html
https://mustangforums.com/forum/2005...n-at-rear.html
https://mustangforums.com/forum/2005...p-the-car.html
https://mustangforums.com/forum/2005...loor-jack.html
https://mustangforums.com/forum/2005...ack-point.html

A custom 'jack pad' that fits into the holes on the subframe is a very handy item to have...

 

While I understand it is important to jack the vehicle up properly, I have not been able to come across anything that will attach to a floor jack allowing the use of the factory jacking points of which appear to only be used for lifting the vehicle off the ground with a lift.

 

It could have been me asking this question a couple years back so I'll try and help for future reference.

You can jack by the:
K-member (front or side)
Frame rails (inside of the plastic moulding you will find a 2-3" lip that runs along side of the car)
LCA mounts on the body (they have a reinforced hump)
Pumpkin

I have used all of these locations without incident.

Jackstands can be placed at those same locations. There are a lot of options for raising the car.