A lock is provided. The lock includes a fixing base, an elastic member disposed on the fixing base, a stopper disposed above the elastic member, a numbering plate disposed above the stopper, a rotating disc disposed above the numbering plate, and a buckle seat disposed on the rotating disc. At least a portion of the stopping part is able to pass through the numbering plate. The rotating disc caps outside the numbering plate, the stopper, and at least a portion of the fixing base.