Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Instant Fail

Purchased this item a while back and did not use it till this past weekend.1. Read instructions2. Installed shaft as described in instructions3. Plugged RotoZip in4. Turned it on to test it...5. Nothing... but smoke coming from the connection between the rotozip and the flexshaft. Melting plastic smell too.I unplugged and took the shaft off the RotoZip. No matter how I tried to spin the business end of the flex shaft... it spun freely without connecting to the inner flex shaft. Reinstalled it several times on the rotozip but the business end never "engaged"... and the connection between the shaft and the Rotozip would just smoke.Totally out of luck now... since there is no Warranty.** DO NOT BUY THIS PRODUCT **