I recently acquired a Manfrotto tripod and it came with this plastic clip on one of the legs, what is its purpose?

I recently acquired a Manfrotto tripod and it came with this plastic clip on one of the legs, what is its purpose?

It is a tool to adjust the tension on the locks for each leg section. The six-sided socket fits over the head of the nut to the upper left in the picture below. If the leg still moves under load when 'locked', then release the leg lock and tighten the nut with the tool. Don't tighten it too much though, or you won't be able to push the lock tab back down.
