Title: Piece of junk died within first hour of use
Review: I recently bought a JT21CM. First nuisance was that the clamps I bought did not fit. After I bought the proper clamps I started an upholstery project of four chairs. After the first chair the fastener started to get harder and harder to open up and within another few clamps it jammed, i.e. ceased to work. I was in the middle of the project and could not find the receipt, so I bought another fastener - a different model from the same company with yet another clamp size; nothing else available - which allowed me to complete the job, but which also did not work as smoothly as I would wish for.I sent an email to Arrow to inquire whether they find it normal that the first fastener failed within the first hour of use. After all they claim "Hardened Steel Working Parts - last longer" and especially "Jam Resistant Mechanism - less downtime". So far - after two weeks - I have not received any answer.
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