Instruct: Classify a review into positive or negative sentiment.
Query: Poor design

I have the DR-80 rack and these are the clamps that are made for that rack,so they should fit right? Well sort of...I just bought a couple since they are cheaper than the others and I found out why they are not used much.They are too tight. I had to use a hammer to slide it on.They also are poorly designed compared to the other clamps that fit this rack (The PC-50, PCX-100 and PCX-200 all fit and I use them all without any problems). My advice is to spend the extra five to ten bucks for the better clamps.