Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Not for newer Waterpiks.

I purchased this set of attachments and a "Waterpik NEW Professional Ultra Dental Water Jet" from Amazon last week. These tips will not work in this Waterpik. The base of the tip, the end inserted into the Waterpik handle, is too small. Both tips in this set are too small.Not really worth sending back to Amazon so I think I'll just use my trusty Dremel tool and some plastic cement to swap the base with one of the tips that came with the Waterpik.