you honestly dont need them your more likely to hurt youself doining it with compressors jack chassis put vehicle bottle jack between axle and chassis remove shocker nuts not turret and jack axle down till able to remove spring
If your doing that dont forget to undo the rear brake hose T piece mount on the axle ( 10 mm )( not the brake lines , you'll figure it out when u get under there ).
Otherwise you'll over stretch your brake hose ( axle will hang on it ) .
Used the to do the front of mine, had no problems, just be a bit careful, as has already been said on this thread, theres hell of a lot o stored enegy in those springs, and it would be nasty if they let go.