KeyGuard Black Pro SL-591 Punch Button Car Window Lock Box The KeyGuard car window lock box is constructed out of weather resistant, non-ferrous metal Internal dimensions: 4 x 2.37 x 1.12 inches  perfect for car keys, fobs, cash or cards Enter your combination using the phone style keypad which has user friendly alphanumeric push buttons No extra hardware needed  secure the KeyGuard to your vehicle by rolling up your car window Rubber cover protects the keypad from debris and foam backing prevents the lock box from scratching your car