All MUL-T-LOCK padlocks are "Restricted Key" high security, designed to provide high security door protection with patented key control. The Schlage Kryptonite door padlocks use a standard Schlage C keyway so they can also use the same key as your other Schlage locks that are on your home or business. We also offer WordLock combinations padlocks so remembering the code is as easy as spelling your name. And once you have your padlock, choose from hasp locks or padlocking slide bolts to secure almost any door.