Assa CLIQ User Manual

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.

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.

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.

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.

Standard-pin
tumbler system

Coded side bar
locking system

Drill-resistant
cylinder plug

Mushroom
driver pins

Countermilling

Side bar

Large
key-bow

System
code

Side bar 
code

Drill-resistant
cylinder housing

Side bar

Shear 
line

®