how to remove spark plug wires ?

hey
i want to replace my spark plugs , theyre old and black
but i don't know how to remove the wires , theyre stuck and i don't want to damage them so what is the right way to remove them ?
(i have the 1.5l sohc engine [F15S3])
Attachment 10278
the wires have some kind of metal shield around them so im not sure what to grip on when i remove , the metal thing or the wire itself [heat shield is red because racecar yo]
Attachment 10279
as you can see the one on the far right one is easy to remove
i hope you can help me
thanks

Just pull. :)

Quote:

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Originally Posted by Daox

Just pull. :)

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Are you sure it's ok to do that on a rececar? :):)

so i grab it from the metal thing and pull or the rubber thing ? that was my question , you know i don't want to damage my precious racecar