How To Use: Step1: Clean the surface. Step2: Peel off the adhesive. Step3: Stick the latch to the frame. Step4: Stick the lock to the door. Step5: Close the cabinet door. Step6: Use the magnetic key to open. Close to the magnetic lock with the key, it will be opened. The magnetic lock will be automatically locked up as long as you close the cabinet door. The maximum effective distance is about 38mm/1.5in, almost satisfied with the opening requirements of all furniture.