Ilco A1638 or 1638 keyblank for various Medeco Biaxial G3 keyways

Description

A1638 is for Medeco G3 Biaxial keyway with 6 pins.
Equivalent to:
Ilco A1638
Jet G3-6
JMA MDC-4S
1638 is
for Medeco G3 Biaxial keyway with 5 pins.
Equivaleent to:
Ilco 1638
JMA MDC-5S
They are both made of Nickel Plated Brass.
These keyblanks must be cut using a High Security key machine.
They can not be cut with a standard key machine because of the special features
incorporated
in the cuts of the key.