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Standard-pin
tumbler system
Coded side bar
locking system
Mushroom
driver pins
Side bar
Countermilling
Shear
line
Side bar
Drill-resistant
cylinder housing
System
code
Drill-resistant
Side bar
cylinder plug
code
No key inserted:
• Standard pins block the
shear line.
• Side bar rests in groove
of cylinder housing,
blocking movement of
plug.
Correct key inserted:
• System code of key lifts
standard pins to shear line.
• Side bar code of key lifts
side pins into a position
where the side bar can be
received. Side bar then
recesses into plug as key
is turned.
ASSA
®
Twin V-10,Twin Exclusive and
Twin Pro High Security Cylinders
The ASSA Twin family of cylinders and keyblanks
were developed for a new generation of lock
technology. Most conventional cylinders can be
manipulated or defeated by force. Many cylinders
marketed as "high security" have no patents
protecting the keys and/or cylinder and there-
fore, no method for key blank control. The
ASSA Twin family meets all of today's
demanding requirements of high security
cylinders–uncompromising physical security
and patented key control.
Physical Security
All Twin family cylinders are built to
U.L. 437 standards, a set of tests for
determining the cylinder's physical resist-
ance against various forms of attack. Two
independent locking mechanisms ensure
optimum pick resistance. Inactive "false"
grooves in the side pins catch the side bar
when improperly positioned. When rotational
force is appliedto pick the lock, the spooled driv-
er pin tumblers, close tolerances, and counter-
milled pin chambers protect the cylinder from vir-
tually every known picking method.
The ASSA Twin
family of cylinders
have also been
tested against pulling,
impressioning and
prying. Case-hardened
steel inserts and stainless
steel pins make the ASSA Twin
family of cylinders resistant to all
types of drilling attack.
Key Control
Precision crafted for the highest security, the
ASSA Twin series key has two sets of bittings
(or key cuts) to operate independent double
locking mechanisms. Each key, reinforced to
help eliminate breakage, has a rounded back
for smooth operation and minimal wear.The
enlarged key bow accommodates use by
manually impaired people.
Patented in the U.S. and internationally, the
innovative ASSA key design eliminates
unauthorized key duplicatation and maintains
a key control system that is unmatched in the
industry. For local, regional or national key
control, the ASSA Twin family of cylinders
provide proprietary keyways for any facility.
Large
key-bow
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