Split key systems are delivered in the highest level section on the key tip (insert):
L - obverse or classic
Y - reverse
0000 - Paracentric
ZZZZ - Quad
D000 - restricted Everest
C000 - open...
With split key construction keying there are two ways the construction insert is retained in the cylinder so that it won't fall out the back end of the plug, see Figure 1.
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All lock cylinders on a specific project are operable by a special "project key". Duplicates of this key may be assigned by the building contractor to workmen and subcontractors as required...
This product was available until 2001 when it was discontinued.
Part Number
Description
XB09-728
Entrapment mortise cylinder, P keyway
XB09-834
Entrapment rim cylinder, P keyway
...