The product is cheaply made. Overseas knock-off. The dumbbells are hard to adjust and stop working shorty after arriving. You can refer on YouTube how yo address this issue but eventually it's just stops working. The company will send you some video or pdf that was created overseas and not in English relating the same as YouTube. If product is still not working the company will insist you've damaged it and not following directions. They try to put it back on the customer. They will not send out replacements whatsoever. I'm assuming that they will respond to this message with some typical this is not the case response. Do not waste your time with these guys at all. I don't ever give feedback but this is horrible especially with the price just go bowflex.