Because there is absolutely no place on their webs...

Because there is absolutely no place on their website or anywhere else to give feedback on them, i shall leave it here.
This is the worst customer service ever. I have been hung up on by customer service the 3 times i tried to contact them about a faulty item in my order. A couple days later, it would only go to voicemail which was "full".
I sent multiple emails, to no response.
In my order, they left out a shoulder bold (<$1 piece) and also sent a poorly machines tool rest arm with incorrect size holes ($60ish dollar item).
They never replied to an email, but sent me the $1 piece, and contested my credit card dispute.
They will fight to keep your money, but not to keep you as a customer. DO NOT BUY FROM THEM!