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Combination Lock Manipulation

Length: 2 Days

Course #: LSI 152

– Electronic & Mechanical Safe Lock Servicing

*You can take a quiz if you don’t have the prerequisite training.

Tuition: $880.00

Initial (1 Time) Enrollment Fee: $100.00

Combination Lock Manipulation

This two-day course will teach you how to use the design flaws in mechanical combination locks to manipulate the wheels and components to obtain a lock’s combination while opening the locking mechanism. All mechanical locks have factory defects, known as tolerances, which allows them to be manipulated. This is a noninvasive method for gaining access to a safe as well as retrieve the combination.

Who Should Attend

The ideal students for this training are those that prefer an alternative to drilling a safe or vault which may also include repairs, or for technicians who want to understand the more complex and in-depth workings of the lock and be capable of determining the combination by manipulation, without drilling the lock.


The objective of this course is to give the lock and safe technicians a cost and time saving option to drilling combination locks. The basic techniques used in this course were originally developed by Harry Miller in the late 1940’s. Students taking this course use dialing techniques and combination lock design and diagnostic information from the pre-requisite Electronic & Mechanical Safe Lock Servicing class to give them sight, sound and feel needed in determining lock combinations.

Course Topics

Course Includes

Manual & Lock Charts
Manipulation Graphs

Course Benefits

LSI Diploma

Recommended Courses for Rapid Advancement

Electronic & Mechanical Safe Lock Servicing
3 Day Course

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