Weak Link? | National Geographic

first we challenged the chains tensile
strength with a most extreme test we
could think of pulling this full-sized
military tank
it weighs 20 tons and rolls on heavy
metal tread a semi tractor will be our
tow truck let’s see if the chain can
take it
with the 40,000 pound tank in the
rearview OnGuard proves that they’ve got
the strength but in the showdown the
excavator will be able to attack the
chain with its hard metal teeth
how will the lock stand up to that
punishment we came to a gun range to
find out I’m gonna show you exactly how
tough our locks really are Rick’s
shooting at this lock from 40 feet with
this badass gun loaded with 357 magnum
ammunition can the lock withstand a
barrage of bullets
yes those bullets bounced off that lock
like Superman so let’s raise the stakes
with an ar-15 so this lock took a direct
hit right into the center of the
mechanism right in the chamber of the
lock it took direct hits to the chain
link itself bullets going over 3,000
feet per second could not penetrate any
point of this luck that’s why these
locks are the absolute toughest in the
world