Can the spherical door lock be locked from the outside?

Can be locked. When the spherical door lock is locked, first press the button on the top of the spherical  of the inner door as shown in the red mark below; then close the door strap tightly so that you can lock them from the outside, but you must pass this lock when opening. It can only be opened. In addition, the spherical door lock does not need a key when it is opened indoors, and the door can be opened by directly twisting the spherical body of the inner door of the building.China Cheap TSA Password Padlocks Factory