Specifications

T
he next two deadbolts covered are made in Europe
and Israel. Both use a common type of mounting
system and the same exact deadbolt bolt, with minor
modifications; the tailpiece brackets are a little different. One
of the bolts was stamped with the name Abloy. It was the
same as the other.
ASSA Deadbolt Test
The ASSA deadbolt is shown in Photograph 4. There is a
probe guard to defeat the ice pick. The lock is held together
with two 1/4 inch high tensile strength black steel bolt cap
screws. These are installed with an allen wrench and
torqued tight.
There was no use drilling for the end of the bolts, for as
we will see, the ends of the bolts are protected by hardened
steel ball bearings. In fact, the rest of the deadbolts in this
article are covered and protected by ball bearings. Some
them you have to install yourself, and others, like in the
ASSA are pre-installed in
the lock by the factory.
If, by some reason,
you could get the ball
bearing out, it would
be very hard to drill
the mounting cap
screws with a battery
operated drill. After
some pounding and
hammering, the
lock was only
slightly marred,
but was not
compromised in
any way. (See
Photograph 5). In
the end, I was
NOT able to
defeat this
deadbolt with the
tools used.
Mul-T-Lock Attack
The Mul-T-Lock deadbolt is similar to the others with a
few interesting adaptations which can be seen in Photograph
6. First is the high security dimple key. The second is at the
end of the bolt, there are two ball bearings that pop out when
the bolt is extended. This has the function of interlocking
the bolt with the high security armored strike. This, in
theory keeps the door from being pried open with a pry tool.
In Photograph 7, we again see anti-probe shields and the
1/4 inch mounting bolts. Since this is a double cylinder lock,
there are a couple of interesting refinements. First, there is a
plug for the end of the cap screw. This is like a shear head
plug. You drive the plug into the screw after installing the
lock and hit down on it. The head of the plug then breaks off
leaving the top flush with the screw.
In this same photograph can be seen the cylinder with
three hardened pins inserted to keep from drilling the shear
line and opening the lock. Off to the right of the cylinder are
two ball bearings that are installed at the base of the cap
screw holes.
All my attacks, including picking, were thus defeated
before I began.
Again, I will not try an opening with only a battery
operated drill if it is doomed to failure without special tools.
At this point, I decided that it was only fair for me to hammer
on the Mul-T-Lock, but I am ashamed to admit that despite
my best efforts in the Test Lab, I could only slightly mark
the finish (see Photograph 8). Blows which totally destroyed
the Defiant glanced off this lock.
3. An ice pick can be inserted into the “Crescent of
Opportunity” (Deadbolt actuator) to probe the bolt into
the open position.
4. ASSA deadbolt prior to installation. Note probe
cover over the bolt actuator and 1/4 inch mounting
screws.
6. The Mul-T-Lock incorporates a few unique features
such as a dimple key to operate and ball bearings in
the end of bolt that interlock with the strike to keep
door from being pried open when bolt is thrown.
50 • The National Locksmith
5. After some pounding and
hammering, the ASSA lock was
only slightly marred, but was
not compromised in any way.
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