Three years ago, we were approached by a local contractor for heavy wood door hinges. Fortunately, our factory already developed the invisible three adjustable hinges based on European designs. We send them two sets of samples, and got feedback that tested very well. The buyer issued an order one month later.  We delivered the price and quality are exceeded their exceptions. The purchasing manager was exciting because he checked with several main retailers and the cost for the similar concealed hinges will be more than double than our offer!  We were happy too!  Satisfied clients always make us happy.