Recognizing
and
Exploiting
P
ersonalit
y
T
raits
Real
lo
c
ks
hav
e
a
wide
range
of
mechanical
features
and
defects
that
help
and
hinder
lo
c
k
picking.
If
a
lo
c
k
do esn't
resp ond
to
scrubbing,
then
it
probably
has
one
of
the
traits
discussed
in
this
chapter.
T
o
op en
the
lo ck,
you
m
ust
diagnose
the
trait
and
apply
the
recommended
technique.
The
exercises
will
help
you
develop
the
mec
hanical
sensitivit
y
and
dexterity
necessary
to
recognize
and
exploit
the
dierent
traits.
9.1
Whic
h
W
a
y
T
o
T
urn
It
can
b e
very
frustrating
to
sp end
a
long
time
picking
a
lo ck
and
then
discov
er
that
y
ou
turned
the
plug
the
wrong
wa
y
.
If
you
turn
a
plug
the
wrong
wa
y
it
will
rotate
freely
until
it
hits
a
stop,
or
until
it
rotates
180
degrees
and
the
drivers
enter
the
keyw
a
y
(see
section
9.11).
Section
9.11
also
explains
how
to
turn
the
plug
more
than
180
degrees
if
that
is
necessary
to
fully
retract
the
b olt.
When
the
plug
is
turned
in
the
correct
direction,
y
ou
should
feel
an
extra
resistance
when
the
plug
cam
engages
the
b
olt
spring.
The
direction
to
turn
the
plug
dep ends
on
the
b olt
mec
hanism,
not
on
the
lo
c
k,
but
here
are
some
general
rules.
Cheap
padlo cks
will
op en
if
the
plug
is
turned
in
either
direction,
so
you
can
chose
the
direction
which
is
b
est
for
the
torque
wrench.
All
padlo cks
made
by
the
Master
company
can
b e
op ened
in
either
direction.
P
adlo c
ks
made
b
y
Y
ale
will
only
op en
if
the
plug
is
turned
clo ckwise.
The
double
plug
Y
ale
cylinder
lo cks
generally
op en
b
y
turning
the
b ottom
of
the
keyw
a
y
(i.e.,
the
at
edge
of
the
key)
aw
a
y
from
the
nearest
do
orframe.
Single
plug
cylinder
lo
c
ks
also
follo
w
this
rule.
See
Figure
9.1.
Lo cks
built
into
the
do
orknob
usually
op
en
clo ckwise.
Desk
and
ling
cabinet
lo cks
also
tend
to
op en
clo
c
kwise.
When
you
encoun
ter
a
new
kind
of
lo ck
mec
hanism,
try
turning
the
plug
in
b oth
direc-tions.
In
the
correct
direction,
the
plug
will
b e
stopp ed
by
the
pins,
so
the
stop
will
feel
mush
y
when
y
ou
use
heavy
torque.
In
the
wrong
direction
the
plug
will
b e
stopp ed
b
y
a
metal
tab,
so
the
stop
will
feel
solid.
27
Figure
9.1:
Direction
to
turn
plug
28
9.2
Ho
w
F
ar
to
T
urn
The
companion
question
to
which
w
a
y
to
turn
a
lo ck
is
how
far
to
turn
it.
Desk
and
ling
cabinet
lo cks
generally
op
en
with
less
than
a
quarter
turn
(90
degrees)
of
the
plug.
When
op ening
a
desk
lo
c
k
try
to
av
oid
having
the
plug
lo ck
in
the
op en
p osition.
Lo cks
built
in
to
do orknobs
also
tend
to
op en
with
less
than
a
quarter
turn.
Lo cks
whic
h
are
separate
from
the
do orknob
tend
to
require
a
half
turn
to
op en.
Deadb olt
lo ck
mechanisms
can
require
almost
a
full
turn
to
op
en.
T
urning
a
lo
c
k
more
than
180
degrees
is
a
dicult
b
ecause
the
driv
ers
enter
the
b
ottom
of
the
k
eyw
a
y
.
See
section
9.11.
9.3
Gra
vit
y
Picking
a
lo ck
that
has
the
springs
at
the
top
is
dieren
t
than
picking
one
with
the
springs
at
the
b ottom.
It
should
b e
obvious
how
to
tell
the
tw
o
apart.
The
nice
feature
of
a
lo
c
k
with
the
springs
at
the
b ottom
is
that
gravit
y
holds
the
k
ey
pins
down
once
they
set.
With
the
set
pins
out
of
the
wa
y
,
it
is
easy
to
nd
and
manipulate
the
remaining
unset
pins.
It
is
also
straight
forw
ard
to
test
for
the
slight
giv
e
of
a
correctly
set
pin.
When
the
springs
are
on
top,
gravit
y
will
pull
the
key
pins
down
after
the
driver
pin
catc
hes
at
the
sheer
line.
In
this
case,
you
can
identify
the
set
pins
b
y
noticing
that
the
key
pin
is
easy
to
lift
and
that
it
do es
not
feel
springy
.
Set
pins
also
rattle
as
you
draw
the
pick
ov
er
them
b
ecause
they
are
not
b
eing
pushed
down
by
the
driver
pin.
9.4
Pins
Not
Setting
If
you
scrub
a
lo ck
and
pins
are
not
setting
even
when
you
v
ary
the
torque,
then
some
pin
has
false
set
and
it
is
keeping
the
rest
of
the
pins
from
setting.
Consider
a
lo ck
whose
pins
prefer
to
set
from
back
to
front.
If
the
backmost
pin
false
sets
high
or
lo
w
(see
Figure
9.2),
then
the
plug
cannot
rotate
enough
to
allow
the
other
pins
to
bind.
It
is
hard
to
recognize
that
a
back
pin
has
false
set
b ecause
the
springiness
of
the
fron
t
pins
mak
es
it
hard
to
sense
the
small
give
of
a
correctly
set
back
pin.
The
main
symptom
of
this
situation
is
that
the
other
pins
will
not
set
unless
a
v
ery
large
torque
is
applied.
When
y
ou
encoun
ter
this
situation,
release
the
torque
and
start
ov
er
by
concentrating
on
the
bac
k
pins.
T
ry
a
light
torque
and
mo derate
pressure,
or
hea
vy
torque
and
heavy
pressure.
T
ry
to
feel
for
the
clic
k
that
happ ens
when
a
pin
reac
hes
the
sheer
line
and
the
plug
rotates
sligh
tly
.
The
click
will
b
e
easier
to
feel
if
y
ou
use
a
sti
torque
wrenc
h.
9.5
Elastic
Deformation
The
in
teresting
even
ts
of
lo ck
pic
king
happ en
ov
er
distances
measured
in
thousandths
of
an
inch.
Ov
er
such
short
distances,
metals
b ehav
e
like
springs.
V
ery
little
force
is
necessary
29
to
de ect
a
piece
metal
o
v
er
those
distances,
and
when
the
force
is
remo
v
ed,
the
metal
will
spring
back
to
its
original
p osition.
Deformation
can
b e
used
to
y
our
adv
an
tage
if
y
ou
w
an
t
to
force
several
pins
to
bind
at
once.
F
or
example,
picking
a
lo
c
k
with
pins
that
prefer
to
set
from
front
to
back
is
slow
b ecause
the
pins
set
one
at
a
time.
This
is
particularly
true
if
you
only
apply
pressure
as
the
pick
is
drawn
out
of
the
lo ck.
Each
pass
of
the
pick
will
only
set
the
frontmost
pin
that
is
binding.
Numerous
passes
are
required
to
set
all
the
pins.
If
the
preference
for
setting
is
not
very