Toolbox
A toolbox or toolkit is a box where a person stores tools. You can find them where people work with tools, like houses that are being built.
Some computer programs used to make other computer programs are also called toolboxes or toolkits (this is a metaphor).
Toolbox Media
Standard site toolbox as used, e.g., in mechanical workshops like automobile repair shops
Cantilever toolbox with carrying handle, popular with mobile service personnel of various professions, in opened state. For transport, the different compartments are kind of folded together (symmetrical towards the middle from both sides) so that a closed compact box with the footprint of the lowermost section results.
A professional socket toolset in a metal box, containing ratcheting socket wrenches in two sizes, sockets, bits and accessories. Such toolsets are standard equipment in mechanical workshops of various types. The image contains annotated descriptions for each item, visible when enlarged.