One of the better weight-lifting shots (there are at least 5 in this challenge). I'm not excited about the background color, but the lighting is very nice.
I think you've lost too much detail on the left side although I know you're trying to get a feeling of weight here. Also, I don't find the metal texture or color to be all that attractive.
Nice composition, texture, colour and lighting. I would have prefered a little more depth of field so that the '5' wasn't so soft. Thematically - maybe it's me, but I would not have recognized this object as a weight if you hadn't titled it so.