Schlage SC1 Keycode Decoder Card

SC1 Key Decoder Card for Schlage KeysThis is a printable decoder card for the Schlage SC1 keyway, a widely used residential key profile in North America. With this tool, you can quickly and accurately read the bitting (cut depths) of any SC1—ideal for locksmithing, key management, or hobbyist curiosity. About the SC1 KeywayThe Schlage SC1 keyway (also known as the Classic “C” keyway) has been a cornerstone of residential and light commercial locking systems in the United States for decades. Manufactured by Schlage, the SC1 became widely adopted due to its tighter manufacturing tolerances and broader depth range compared to many competing residential keyways.The SC1 is typically configured as a 5-pin tumbler system, though many locks also support 6-pin versions. It uses ten standardized cut depths (0–9), allowing for a greater number of key combinations and expanded master keying capability.Today, SC1 remains one of the most prevalent key profiles in North America, commonly found in hom