It is in between a 9/16 inch and a 5/8 inch.
The 15 mm wrench, which is probably one of the most used wrenches.
15 mm
15 mm
You need a 15 mm regular wrench.
If it's a late 90 's Ford it's a 15 mm wrench.
What size line wrench for a 2005 freestar
You need a 15 mm wrench.
The next size smaller than 1 inch in metric wrench sizes is 25 mm. This is because 1 inch is equivalent to approximately 25.4 mm, and 25 mm is the closest standard metric size below that measurement.
15 mm
Not likely to be Allen key, try 15 mm regular wrench
15 mm
It would be either a 15 mm wrench or a 7mm Allen key.