About this item
The BEST 1A1A1KS208KS800 is a standard 7-pin A keyway key blank from BEST Access Systems - now dormakaba - stamped "Best Duplication Prohibited" on the face with a blank back, sold in boxes of 50 nickel silver blanks. If you searched "best key duplication prohibited", "best a key blank", "best a keyway", "best a key blanks", or "us lock key blanks" - this is the product.
What "Duplication Prohibited" Actually Means on a BEST Key
Most key blanks you'll find at a hardware store are open keyways - Schlage C, Kwikset KW1, and similar cuts that any key machine at any hardware store can duplicate without restriction. Anyone who gets their hands on one of those keys can walk into a Home Depot and have it copied in five minutes.
BEST key blanks don't work that way. The A keyway is a controlled keyway, meaning the blank itself is only available through authorized BEST/dormakaba distributors. Hardware stores and consumer key kiosks don't stock it and their machines can't cut it correctly even if they tried. The "Duplication Prohibited" stamp on the face of the key is a direct instruction to any locksmith or key cutter who sees it - this key is part of a controlled system, and copies require authorization.
That's what the stamp actually does: it creates accountability. A maintenance worker who loses a key and tries to get it copied will be turned away anywhere except an authorized distributor. That single friction point is often the difference between a security incident and a non-event.
Model Number Decoded: 1A1A1KS208KS800
The BEST model numbering system for key blanks is specific and worth knowing if you're ordering across multiple keyways:
1A - Standard BEST key blank product line. The 1A prefix appears across all BEST standard keyway blanks.
1A - The second "1A" in the string designates the format as a standard blank (not a hotel variant or control key blank).
1 - Indicates the standard pin count configuration within this keyway series.
A - The keyway designation. This blank fits cylinders and SFIC cores cut to the BEST A keyway profile. The A keyway is the most widely deployed keyway in the BEST standard system - used throughout BEST 1C, 1D, 1E, 6K, 7K, 9K, 6E, 7E, and 9E series cylinders in schools, hospitals, universities, government buildings, and commercial campuses across North America.
KS208 - The key blank cut specification code identifying this as the 7-pin standard blank stamped "Best Duplication Prohibited."
KS800 - The packaging and finish code for nickel silver material in this form factor.
KS208 vs KS473: The Two BEST "Duplication Prohibited" Blanks
If you're ordering BEST A keyway blanks and you've seen both the KS208 and KS473 suffixes, here's the difference:
1A1A1KS208KS800 (this listing): Stamped "Best Duplication Prohibited" - includes the brand name "Best" in the stamping on the key face.
1A1A1KS473KS800: Stamped "Duplication Prohibited" - same restriction, brand name omitted from the stamp text.
Both are controlled A keyway blanks. Both require authorization to purchase. The choice between them typically comes down to what a facility's key control documentation specifies or what the original key system administrator standardized on. If your existing keys say "Best Duplication Prohibited" on the face, order KS208 to match. If they say "Duplication Prohibited" without the brand name, order KS473.
"Back Is Blank": What That Means for Your System
The reverse side of each 1A1A1KS208KS800 blank ships unmarked. That's intentional. The blank back is where a facility's locksmith, key system administrator, or the BEST/dormakaba dealer stamps the facility's system number, key number, or ownership identifier.
In a properly managed institutional key system, every key in circulation has a traceable number linking it to a specific person, door, or authorization level. Blank-back blanks give the administrator control over that numbering sequence - keys are stamped with your system's identifiers when they're cut, not with generic manufacturer codes.
What Locks Use the BEST A Keyway
The A keyway is the baseline BEST standard keyway. It's found in:
BEST 1C Series conventional cylinders (the most common BEST conventional cylinder in institutional construction). BEST 1D, 1E rim cylinders. BEST 6K, 7K, 9K SFIC format padlocks and cylinders when keyed to A keyway. BEST cylindrical locksets (6 and 7 series) keyed to A. Any building that has been using BEST/Stanley Best hardware over the last several decades likely has A keyway cylinders somewhere in the system.
If you're not certain which keyway your cylinders are cut to, the letter is typically stamped on the cylinder face or bow of the key itself.
"US Lock Key Blanks": Ordering Context
If you searched "us lock key blanks" - US Lock (United States Lock) is a distributor catalog designation some facilities and purchasing departments use to reference institutional commercial key blanks. The BEST 1A1A1KS208KS800 is a standard institutional key blank available through commercial hardware distributors and lock supply channels, not consumer retail. Ordering in boxes of 50 is the standard commercial quantity for facility key systems.
Specifications
Model: BEST 1A1A1KS208KS800
Brand: BEST Access Systems (dormakaba)
Keyway: A - standard BEST keyway, most widely deployed in BEST institutional systems
Key Type: Standard 7-pin blank
Material: Nickel silver
Face Stamp: "Best Duplication Prohibited"
Back: Blank (for facility system number stamping)
Quantity: Box of 50
Related KS473 Variant: 1A1A1KS473KS800 - same A keyway, stamped "Duplication Prohibited" (no brand name)
Other Keyway Variants in KS208: 1A1B1KS208KS800 (B keyway), 1A1C1KS208KS800 (C keyway), 1A1D1, 1A1E1, 1A1J1, 1A1L1, 1A1M1, 1A1Q1, 1A1R1, etc.
Compatible Cylinders: BEST 1C, 1D, 1E, 6K, 7K, 9K, 6E, 7E, 9E series and others cut to A keyway
Key Control: Controlled distribution - authorized BEST/dormakaba distributors only
American Locksets has stocked BEST Access Systems key blanks since 2001.
Trusted Since 2001
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