To the hardware store to purchase the lock tools according to unlock tool types and features of different choice of different class unlock tool. At present in the safety lock unlock tool is divided into a variety of company sales: one kind is original parts, general rarely, expensive. Deputy factory is one of the most is a relatively full, quality can also, also is normal manufacturer production. There are some real estate, are mostly fake and inferior products, and is some private factory processing, quality is not very good but the price much cheaper. Sometimes may be refurbished parts, because of the level is not consistent, so there are good and bad, the price also cheap.