1, high-end imports of the hand has a full set of imported and imported accessories domestic assembly points, the price is different, should pay attention to the distinction. Again, if the merchant says it is imported, it should be able to produce a closing order.
2, the more complex the structure of the handle is more expensive. A double tongue lock is not necessarily more expensive than a single tongue. In general, the modernization of the lock handle, its safety and the complexity of the switch operation is not very much related. Simple operation of the lock is not necessarily not insurance, and the opening of a very complex lock is not necessarily reliable. A reasonable design of the lock switch operation procedure should be a glance, can be easily operated.
3, Pure copper handle is not necessarily more expensive than stainless steel, to see the process. Again, plastic door handle beautiful also best not to buy, because its strength is not enough, once broken, even the door can not open.