Changeable combination with a total of 1000 possible combinations. Equipped with a magnet and a metal plate with adhesive pad. Withstands rain and snow and freezing conditions. Easy to operate with one hand. Protective lock cover. Store a car key up to 3 in L x 1-1/2 in W x 0.10 in T. Removable foam insert. Attachment point for a lanyard or zip tie. Size of 3-1/4 in L x 2-1/4 in W x 3/4 in T.