Instruct: Classify Amazon reviews into positive or negative sentiment
Query: its a great tool

I have had a pair of 6" capacity clamps for over 20 years and use them all the time in my shop. Wouldn't be without them.I would like to buy longer bars to increase the capacity to 12", 18" and 24". I don't see the need for additional clamps just the longer bars.If any one knows where to buy longer bars please let me know.