Available 7 pin only
CX keyways 
CORMAX user form required 
Available combinated (keyed) or uncombinated
Patented key and slide pin design that delivers a higher security key system. Unauthorized duplication of keys is prohibited
Allows for customized master keying and quick core or key changes
Compatible with the BEST Standard core system including standard-issue key cutting equipment so there is no need to invest more money in a new key cutter or combination kit
Offers several levels of geographic exclusivity
The M Series keys operate both CORMAX and BEST Standard cores (backward compatibility) with J, K, L and M keyways, allowing for easier management of a hybrid keying solution.