Magnetizer

 These tools appear to be on the list of "works in magnetizers". In this case, assume that "magnetizer" refers to a device used to magnetize tools or parts. Here's how these tools might play a role in a magnetizer:

 Electric and air-operated screwdriver bits, screwdrivers, sockets and Allen wrenches may need to be magnetized to ensure that they can effectively attract and tighten screws or nuts when used, thereby improving work efficiency and accuracy.

 Glass hole openers, marble hole openers, and carbide tools may need to be magnetized to allow for easier positioning and retention on the work surface while in use, thereby increasing precision and safety.

 Magnetizing these tools and equipment may help improve their efficiency and convenience in actual production operations.