Why might a standard prying tool not be effective on certain locks?

A standard prying tool may not be effective on certain locks because some locks are designed with features, such as cone-shaped covers, that impede the functionality of such tools. These cone-shaped covers create barriers that prevent the prying tool from gaining proper leverage or access to manipulate the lock mechanism effectively. The design of these locks is intentionally set up to resist unauthorized entry and to protect against forced entry techniques.

In contrast, other aspects such as manufacturing costs, ergonomic designs, or portability do not directly impact the functionality of a prying tool on locks. While those factors are relevant in a broader context of tool design and usability, they do not specifically address the mechanical challenges posed by certain lock types when using a standard prying tool.