buy this to compliment the 552 I already have . upon unwrap , I notice some minor scratch on some of the part , but not a big deal . installation be easy and straight forward use a socket wrench along with the supply allen wrench . installation take about 45 min include unboxing . once complete , the stand feel rock solid with no play at all . it come with lockable caster wheel which I do not install , but definitively useful if you find the need to roll it out of the way . recommend to anyone with a set of 552 or 1090 dumbbell .