Hi,
If you have lost the combination, the only option would be to contact the manufacturer.
Read :-
http://www.stack-on.com/pages/faqs
Complete the
key or combination request form
(pdf), which is available on this web site, and mail to Stack-On
Products, Co. You can also call our Customer Service department at
1-800-323-9601 and request that a form be mailed, emailed or faxed to
you for completion.
Let me know,if needed further assistance.
Hope i helped you.
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