If only it took two different keys to get into and out of your house.
I keep finding my house key on the fence in the backyard. Give it back, squirrels! It's not one of you!
Wait, is the one eating brains the work key or the locker? Or is that the bullet wound? Zombies, you're so confusing!
Available at: Gadget4all http://gadget4all.com/proddetail.php?prodid=01112&deptid=&catid=025 ($7)