Secure the Surflogic Key Lock Maxi to your car or roof rack to keep your key safe while on the water. Safe padlock resistant all-metal construction Easy to secure anywhere: attach to your car, your vehicle, your roof-rack, wheels or trailer4 digit combination Foam backing to protect car surface Portable and compact, keep it in the glove box of your car Able to fit all size keys Padlock Size (exterior) Width: 76 mm / 3″ Length: 190 mm / 7.50″ Height: 45 mm / 1.77″ Weight 675 g Internal compartment size Width: 69 mm / 2.70″ Length: 107 mm / 4.20″ Height: 40 mm / 1.57″