First time I used this product the adjustable piece broke (the thing that adjust the neck bands), however I was to lazy to send it back to the company, so I recreate the Isolator, I took the neck strap off and remove the screws and drill the holes little bigger and went to lowes and brought two carabiner that hold about 200 pounds(2 dollars) and washers to stick in the holes of Isolator that I drill and I used a computer case shoulder strap that had close and open end metal hooks.
I know what you saying!! however, I would still had spend 10-20 dollars or more on another one, I guarantee now this product is better than anyother and better than before. Weider should pay me to remake there product, if you have the money and you find it not worth it doing what I did, buy a different brand. Biceps Isolator are very good in trying to get bigger biceps try it with phospaghen elite from EAS (creatine) talking about a hell of a pump.
P.S. the three stars I gave it was for me not Weider.