Features:
1. The whole Lock is made of ABS engineer plastic
2. User sets his or her own random codes
3. Master key for emergency door opening and retrieve the lost code.
4. Keyless and no power supply

Application: All kinds of locker material (ABS plastic, metal, PVC and wood) in school, family and club

Outside size
1. The thickness of the steel material door should be less than 1mm
2. As for the wood or any other similar material locker, the thickness of door should be less than 20mm.