Hiding a key under a rock is silly. Putting your keys in your pocket for a run along the waterfront is a nuisance! With this Hitch Safe I can stow a spare set of keys, or leave my credit card, cash and giant key ring behind so I can enjoy my outdoor activities without worrying if I'll lose my valuables 8 miles back in the woods! Hitch Safe is easy to get to, totally secure, and your keys won't be all wet and gritty when you need them. The four number, combination lock is easy-to-set yourself and remember. Heavy gauge, all-steel construction locks into your hitch receiver from the inside so it is impossible to remove. The storage compartment is 1 1/4" wide x 1 5/8" high x 3 5/8" deep and large enough for cash, credit cards and your spare keys. I even include a durable rubber dust cover to protect the combination cylinders and keep a clean look to the back of your vehicle.