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Pro Series ® High Security
  • Greatest physical security available:
    • Heavy steel bodies
    • Hardened steel and boron alloy shackles for superior cut resistance
    • Dual deadbolt locking for extreme resistance to prying
  • High key security:
    • 5-pin tumbler Pro Series® cylinders provide tens of thousands of key changes
    • Specialy spool pins are virtually impossible to pick
  • Rekeyable - replaceable cylinder and shackle

Solid Iron Shroud

+ click an image above to enlarge
    Greatest Security Against Bolt Cutters
  • Proprietary rustproofing for longer life
  • Defeats attempts to pry and cut
Lock Specialty
Commercial Products Discount
15% Off
Quantity
30% Off
Shelf Pack
40% Off
Master Carton
Solid Iron Shroud ( 6321, 6325, 6327)
1-5
6-23
24+
Master Lock Model #
Description
Vertical Shackle Clearance (B)
List Price US$ (each)

2-1/8" (54mm) w. Laminated Steel Body. Shackle Dim.: A: 5/16" (8mm) C: 7/8" (22mm)

6321
6321KA
6321MK
6321KAMK

Keyed Different
Keeyed ALike
Master Keyed
Keyed Alike, Master Keyed

3/4" (19mm)
3/4" (19mm)
3/4" (19mm)
3/4" (19mm)
$33.70
$34.75
$38.65
$39.70

2-3/8" (60mm) w. Laminated Steel Body. Shackle Dim.: A: 3/8" (10mm) C: 7/8" (22mm)

6325
6325KA
6325MK
6325KAMK
Keyed Different
Keyed Alike
Master Keyed
Keyed Alike, Master Keyed
3/4" (19mm)
3/4" (19mm)
3/4" (19mm)
3/4" (19mm)
$39.88
$40.93
$44.83
$45.88

2-5/8" (67mm) w. Laminated Steel Body. Shackle Dim.: A: 7/16" (11mm) C: 7/8" (22mm)

6327
6327KA
6327MK
6327KAMK
Keyed Different
Keyed Alike
Master Keyed
Keyed Alike, Master Keyed
3/4" (19mm)
3/4" (19mm)
3/4" (19mm)
3/4" (19mm)
$45.98
$47.03
$50.93
$51.98
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Solid Steel

+ click an image above to enlarge
    Outstanding Protection
  • Chrome rustproofing provides longer life
  • Shrouded & hidden shackle models defy bolt cutters and prying
Lock Specialty
Commercial Products Discount
15% Off
Quantity
30% Off
Shelf Pack
40% Off
Master Carton
Solid Steel ( 6230, 7035, 7045, 7030, 7040, 7050 )
Round Solid Steel Hidden Shackle ( 6270 )
Round Steel Hasp ( 770 )
1-5

1-3
1-3
6-23

4-11
4-11
24+

12+
12+
Master Lock Model #
Description
Vertical Shackle Clearance (B)
List Price US$ (each)

1-9/16" (40mm) w. Solid Steel Body. Shackle Dim.: A: 1/4" (6mm) C: 25/32" (20mm)

7030
7030LF
7030LT
7030KA
7030KALF
7030KALT
7030MK
7030KAMK
Keyed Different
Keyed Different, Extra Length Shackle
Keyed Different, Extra Length Shackle
Keyed Alike
Keyed Alike, Extra Length Shackle
Keyed Alike, Extra Length Shackle
Master Keyed
Keyed Alike, Master Keyed
1-1/16" (27mm)
1-9/16" (40mm)
3" (72mm)
1-1/16" (27mm)
1-9/16" (40mm)
3" (72mm)
1-1/16" (27mm)
1-1/16" (27mm)
$18.70
$20.95
$21.25
$19.75
$22.00
$22.30
$23.65
$24.70

1-9/16" (40mm) w. Solid Steel Body, Shrouded. Shackle Dim.: A: 1/4" (6mm) C: 25/32" (20mm)

7035
7035KA
7035MK
7035KAMK
Keyed Different
Keyed Alike
Master Keyed
Keyed Alike, Master Keyed
1-1/16" (27mm)
1-1/16" (27mm)
1-1/16" (27mm)
1-1/16" (27mm)
$35.39
$36.44
$40.34
$41.39

1-3/4" (44mm) w. Solid Steel Body. Shackle Dim.: A: 5/16" (8mm) C: 29/32" (23mm)

7040
7040LJ
7040KA
7040KALJ
7040MK
7040KAMK
Keyed Different
Keyed Different, Extra Length Shackle
Master Alike
Keyed Alike, Extra Length Shackle
Master Keyed
Keyed Alike, Master Keyed
1-3/16" (30mm)
2-1/2" (63mm)
1-3/16" (30mm)
2-1/2" (63mm)
1-3/16" (30mm)
1-3/16" (30mm)
$20.62
$23.07
$21.67
$24.12
$25.57
$26.62

1-3/4" (44mm) w. Solid Steel Body, Shrouded. Shackle Dim.: A: 5/16" (8mm) C: 29/32" (23mm)

7045
7045KA
7045MK
7045KAMK
Keyed Different
Keyed Alike
Master Keyed
Keyed Alike, Master Keyed
1-3/16" (30mm)
1-3/16" (30mm)
1-3/16" (30mm)
1-3/16" (30mm)
$36.56
$37.61
$41.51
$42.56

2" (51mm) w. Solid Steel Body. Shackle Dim.: A: 3/8" (10mm) C: 29/32" (23mm)

7050
7050LJ
7050KA
7050KALJ
7050MK
7050KAMK
Keyed Different
Keyed Different, Extra Length Shackle
Keyed Alike
Keyed Alike, Extra Length Shackle
Master Keyed
Keyed Alike, Master Keyed
1-1/2" (38mm)
2-1/2" (63mm)
1-1/2" (38mm)
2-1/2" (63mm)
1-1/2" (38mm)
1-1/2" (38mm)
$24.44
$26.89
$25.49
$27.94
$29.49
$30.44

2-1/2" (63mm) w. Solid Steel Body. Shackle Dim.: A: 7/16" (11mm) C:7/8" (22mm)

6230
6230LH
6230KA
6230KALH
6230MK
6230KAMK
Keyed Different
Keyed Different, Extra Length Shackle
Keyed Alike
Keyed Alike, Extra Length Shackle
Master Keyed
Keyed Alike, Master Keyed
1-1/8" (29mm)
2" (51mm)
1-1/8" (29mm)
2" (51mm)
1-1/8" (29mm)
1-1/8" (29mm)
$31.39
$33.74
$32.44
$34.79
$36.34
$37.39

2-7/8" (73mm) w. Solid Steel Body. Hidden 3/8" (10mm) Diameter Shackle

6270
6270KA
6270MK
6270KAMK

Keyed Different
Keyed Alike
Master Keyed
Keyed Alike, Master Keyed
n/a
n/a
n/a
n/a
$42.41
$43.46
$47.36
$48.41

2-7/8" (73mm) w. Reinforced Die Cast Body. Hidden 3/8" (10mm) Diameter Shackle

6271
6271KA
6271MK
6271KAMK
Keyed Different
Keyed Alike
Master Keyed
Keyed Alike, Master Keyed
n/a
n/a
n/a
n/a
$33.20
$34.25
$38.15
$39.20

9" (23mm) w. x 4-1/2" (11.4cm) High Solid Steel Hasp

770 Use With 6270 and 6271 Locks
n/a
$27.57
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