Smart Digital Door Lock is made of metal material, sturdy and durable. With chromium coating design of outer appearance and skidproof feature, it can reduce the possibility of chemical reactions like mechanical wear and chemical corrosion. It applies to various doors, such as wooden, metal, glass, stainless steel doors,s, etc. The door thickness between 30 to 55 mm is acceptable. The bore hole is 54mm.The distance from the edge to the center of the bore hole is 60 to 70 mm.
