If you say "tools that include X", then X is A COMPONENT of the tools. so, for instance, "tools that include a bottle opener" means that a bottle opener is one of many attachments.
on the other hand, "tools(,) including X" implies that X is ONE OF the tools. so, for instance, "tools(,) including a bottle opener" means that the bottle opener itself is one of the tools in question.
on the other hand, "tools(,) including X" implies that X is ONE OF the tools. so, for instance, "tools(,) including a bottle opener" means that the bottle opener itself is one of the tools in question.
