Recruitment 1 - Weighing method: Generally, the weight of the stainless steel lock of the same volume will be heavier than that of the zinc alloy. It can be felt from the weight and feel of the hand. Recruitment 2 - Scratch method: It can be rubbed on the reverse side of the lock panel with a sharp knife or a sharp knife. The texture is generally hard and the stainless steel lock is consistent inside and outside the mark. The texture is soft and the white is Zinc alloy lock. Recruitment 3 - Visual inspection: Generally, the stainless steel lock is natural, exquisite and delicate, and the texture is warm. It shows a beautiful natural texture under the illumination of the light; while the zinc alloy lock is generally electroplated. If the plating layer is too small, it will be revealed. Uneven texture, obvious signs of spraying. [Miscellaneous reminder] Do not go inside the lock cylinder, drop cooking oil or oil When the door lock is not used for a long time or after a period of use, the lock cylinder may not be flexible. Many people are used to dropping a few drops of cooking oil or oil into it to increase its flexibility. The industry reminds that it is best not to go inside the lock. Drip the oil, you can put some pencil core scraps into the key eye, or drop a few drops of lubricant (preferably the sewing oil, kerosene can also be), and the lock can be used to restore flexibility when the activity is turned on a few times. Secondly, do not wipe the lock body and handle with a damp cloth, because it is easy to cause rust or discoloration. Pvc Moulding Divison,Moulding Division,Pvc Extrusion Mould,Pvc Extrusion Moulding Starter TAISHAN CITY WANAN CABLE CO.,LTD , https://www.tswanan.com