It's a pharmaceutical company. No, only kidding.

A squib is a small explosive device which has a wide range of uses, such as generating mechanical forces as well as in pyrotechnic use. A squib can range in size from 2 to 15 millimetres in diameter. The squib, being an explosive device, releases a lot of energy, and can be used for shattering, triggering, propelling and cutting a wide range of materials.

It is different from a detonator, which is used specifically to trigger a larger explosive. A squib may indeed be energetic enough to initiate high explosives, but that is not its primary purpose. A squib is also not an electric match, which produces only a flash of flame and is used to ignite pyrotechnics and fireworks.