Description: Scope: This is mainly used in the locks on interior doors, the doors are steel doors can be installed Applicable door thickness: 35-55mm, 60mm margins door Pure password to open the door, do not worry about the inconvenience Each lock comes standard with instructions in English Make sure before you buy a left or right door open, so as to avoid unnecessary trouble Specification: Materials:Zinc alloy Size: Approx.40x145x83mm/ 1.57x 5.70x3.26" Package Includes: 1 Set Door Lock 1Pieces User Manual