Have L keyway blanks always been stainless steel

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HIGH SECURITY Primus/Primus XP: In addition to six cuts for standard locking mechanism, there are five side finger pins to operate the secondary sidebar lock. Primus keys will operate non-Primus l...
Choose the appropriate full size control key from the selection below.
Classic Conventional Key Blanks and Cut Keys Part Number Description Key Blanks 35-056 Control Standard bow, embossed both sides 35-076 Standard bow, unembossed both s...
Schlage does not recommend cutting the L or LP section key blanks in the field.  Below are some details.Non Primus:In the classic family of keyways the "L" key section is the highest level key...