Master Lock 5423D Wall Mount Lock Box, 3-1/8" W, Black The Master Lock 5423D Wall Mount Push Button Lock Box features a 3-1/8in (79mm) wide metal body for durability. The wall mount design offers permanent installation. Set your own 4 character combination for keyless convenience and increased security. The protective weather cover prevents freezing and jamming; And molded bumper and vinyl coated shackle prevent scratching. Features Key lock box enables secure storage of up to five keys; Designed for installation to a wall or fixed object (hardware included) Set your own alpha/numeric combination lock box; Reset the combination for multiple personalized combination code options For indoor and outdoor use; Key safe is constructed with a metal body for durability and weather cover to protect combination buttons Exterior dimensions: 4-5/8 inch (11.7 centimeter) H x 3-1/8 inch (7.9 centimeter) W x 2-1/16 D (5.2 centimeter) Interior dimensions: 3-1/2 inch (8.9 centimeter) H x 2-1/4 inch (5.7 centimeter) W x 1 inch (2.5 centimeter) D; 7.9 cubic inch (20 cubic centimeter) volume USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.