Large capacity key lock box enables secure storage of up to five keys; Designed for installation to a wall or fixed object Set your own four-digit combination lock box; Reset the combination for thousands of personalized combination code options For indoor and outdoor use; Key safe is constructed with a metal body for durability and shutter door to protect combination dials from weather Exterior dimensions: 4-3/4 inch (12 centimeter) H x 3-1/4 inch (8.3 centimeter) W x 1-1/2 inch (3.8 centimeter) D Interior dimensions: 3-1/4 inch (8.3 centimeter) H x 2-1/4 inch (5.7 centimeter) W x 1 inch (2.5 centimeter) D; 7.3 cubic inch (18.5 cubic centimeter) volume