Airport security question?

I'm 18, this is my first time flying in four years so I have a question. I have 15 pound dumbbells that I use to work out with but I don't use them anymore so I am going to fly them to my little brother in vegas from Sacramento I will be leaving for Sacramento Airport on July 11th but have a question, they are original 10 pound weights however I have duct taped five pound weights on top of them to increase the weight, they pretty much look like weights taped together with duct tape but I guess could somewhat resemble a bomb or something, will TSA become suspicious or want to interview me or anything? Just since it's like out of the ordinary? Thanks.