This set of 9 britool metric hex keys are handy for when itrsquos not possible to carry a heavy load of tools around or even if you simply donrsquot want too this set includes nine different sizes so there is a tool for most jobs and all nine are stored in a folding key set for easy storage and transport however despite being so portable and lightweight there is no loss in quality the keys are manufactured from zinc plated chrome steel so they are tough and durable