We both have rolling bridge jacks ....... however Bendpak no longer sells rolling bridge but rather sliding bridge jacks; go ahead and ask how I know.
In any case the sliding bridge jacks are as sandman shared; a POS and I follow with PITA so we suggest you look elsewhere and likely wil need to adapt them to your lift. Mine after much back and forth are less than 1" above the ramps so I have zero issues.