Kwikset 81693-002-Key Blanks Do Not Duplicate Key

It's a blank stamped Do Not Duplicate, so the marking is a policy deterrent, not a mechanical one. Any shop willing to cut it can cut it. If you need copying actually restricted, you want a patented restricted keyway system with a key control card, not a stamped blank. What this Kwikset blank gives you is a visible warning on every key you hand out, which is enough for most residential and small rental use.

It's a blank. It arrives uncut and has to be cut to your existing key or your lock's bitting by a locksmith or a key machine before it will turn anything. Buy the count you need cut in one trip.

No. A Kwikset blank won't enter a Schlage cylinder; the keyways are different and won't interchange. For Schlage C keyway cylinders, the Emtek MS4-KEYBLKC blank is the one to order.

For a Schlage C keyway cylinder, use the Emtek MS4-KEYBLKC, which is a key blank made for the Schlage C keyway. The Kwikset 81693-002 is a Kwikset key blank carrying a Do Not Duplicate marking, so it is the one to order when you are cutting keys for Kwikset cylinders and want the restriction stamped on the key. Keyway decides this one: a blank only enters the cylinder it is milled for, so confirm the keyway on the plug before ordering either.

No. The Emtek MS4-KEYBLKC is milled for the Schlage C keyway, so it is a peer product rather than a drop-in stand-in for the Kwikset 81693-002 Kwikset blank. The two are alternatives to each other only in the sense that a locksmith stocks both and pulls whichever matches the keyway in front of them. Cutting the wrong blank produces a key that will not enter the plug regardless of how correctly the bitting is cut.

Kwikset lists the 81693-002 blank as a residential item. It suits homes, rentals, and light multi-family work. For a commercial opening with a mortise or Grade 1 cylinder, you're generally on a different keyway and should be buying blanks for that cylinder family instead.

Yes, if you're the owner or authorized. The stamp isn't a legal lock on duplication, so a locksmith can cut the 81693-002 for you and will typically ask for proof you control the property. That's the practical value for a property manager: tenants get keys that most hardware counters will refuse to copy on sight, while you keep cutting more as units turn over.

Order the Kwikset 81693-002, which is a Do Not Duplicate key blank - the restriction is printed on the key bow itself. The Emtek MS4-KEYBLKC is a plain Schlage C keyway blank, so keys cut from it carry no such marking. For a property manager handing keys to tenants or vendors, the marked blank is the one that puts the request in front of whoever is asked to copy it, though a Do Not Duplicate stamp is an instruction rather than a mechanical restriction; a patented restricted keyway is what actually blocks duplication.