4 inches is good enough dont overthink it , install is easy stand up columns , measure measure , square up , level columns , punch holes , run hyd line, wire it , put fluid in , done
Im probably under the ******* category I ordered a triumph drive on a few weeks ago from pro auto lifts supposed to show up today HHHHMMM might have got burned cuz I used a debit card
They are tough well worth the money , I double up a box wrench onto a box ratchet quite often have yet to break one , even the 1/4 inch wobbly chrome sockets are great.
They are tough i love mine can pull a drawer out use as a bench to sit on or use the ladder to climb on top of the chest even my old 40 year old chest do the same