The tool operates on the principle of mechanical feedback analysis. When tension is applied, the pins bind at the shear line between the plug and the housing, setting the stage for precise measurement.

• Libraries have various locked compartments for supplies, cash, or after-hours book drops. If a dedicated key is misplaced, maintenance staff can use a Lishi tool to regain access. This minimizes disruption to library operations and services.

• The tool transmits clear, real-time tactile information from the lock's pins directly to the user's hand. Simultaneously, the user receives visual confirmation via the moving pointer on the external scale, creating a dual-sensory feedback loop.

• Recognize the tool's limits. It is not effective on all lock types, such as disk detainers or certain high-security dimple locks. Know when a different method or tool is required.