Some say it is, some say it's for factory use to lift and move the frames ! I have these on my Puck L and use them sometimes for 'servicing' jacking and as a possible emergency jacking system, using a VW 'Transporter Jack' (for the extra lift height required above the normal VW car jack!) However many recommend that you jack on the axle only, using a bottle jack or a trolley jack !
Other opinions are available ! See what others have to say !