I agree, they do look a bit low
the link says..
"These racks are very good piece of equipment, They are ideal for pressing bench or for Shrugs, Curls, Squats, bars stands. Exercise barbell, for upper body workout. The more you use these racks the more you will like them."
I don't possibly see how those could be used for squats, but I'm sure they will get the job done for benching.