Ford TPMS Tool

[orion]

I've seen some sites sell this Ford TPMS tool and was wondering if its something that is worth keeping on hand? Does anyone own one? Can anyone give me more insight on it?

Link - http://www.shoptpms.com/Ford_Trigger_TPMS_Tool_p/fordtrigger.001.htm

[TPMS Guru]

This trigger tool is needed to reset your TPMS sensors. It would be useful to have one.