Sperical bearings(rosejoints) are like a metal ball with ahole drilled through in a metal bearing eye, will try + find a link 2. competition cars use them as there is no rubber so no play.
if you get a long bar/screwdriver between ARbar + wishbone +pry you will see movement in the rubbers on mine now there is no play at all, so all load placed upon bar is transfered into bar + not taking play up in rubbers.
with bearings,nylocnuts,washers came 2 £25, can honestly say best £25 i've spent on a car. although condition of droplinks unknown but did pass MOT over wk ago!!