The collective noun for tools is ‘set.’ When we refer to tools as a set, we are indicating a group of tools that are typically used together for a specific purpose. For example, one might say a ‘set of tools’ when talking about a collection that includes a hammer, screwdriver, and pliers, all of which are essential for various repair tasks.
This term highlights the functional relationship between the tools, as they often complement each other in their use. While there are other collective nouns for different groups, ‘set’ is the most commonly recognized term for tools.