Associated Locksmiths of America (ALOA) Practice Test 2026 – Your Comprehensive All-in-One Guide to Exam Excellence!

The correct answer highlights that a pin size increment of 0.015 necessitates a two-step progression for Schlage locks. In the context of pin tumblers and lock mechanisms, a two-step progression is used to ensure the pins align properly for the lock to function effectively.

When modifying or adjusting pins, each increment in size must be significant enough to affect the lock's performance. A 0.015 increase ensures that the pins fit snugly within their respective chambers, promoting a secure lock mechanism. If the increment were larger, it could risk disrupting the proper engagement of the lock's pins, leading to malfunction or increased wear over time. Therefore, understanding the specifics of how small increments impact the function helps locksmiths maintain and service locks effectively.

Other increments listed do not require the same two-step progression because they are either larger, leading to a different adjustment strategy, or fall within acceptable single-step changes that can be adjusted without compromising the lock's integrity. This knowledge is essential for ensuring that locks maintain their security features while allowing for necessary adjustments.