An adjustable arm includes a base member with a base rotatable joint member connected thereto, a lower arm having one end connected to the base rotatable joint member with {HEAD ~ a central joint member} connected to {TAIL ~ the other end} thereof and also to one end of an upper arm while a head joint member is connected to the other end of the upper arm 
connected to
An adjustable arm includes a base member with a base rotatable joint member connected thereto , a lower arm having one end connected to the base rotatable joint member with { HEAD ~ a central joint member } connected to { TAIL ~ the other end } thereof and also to one end of an upper arm while a head joint member is connected to the other end of the upper arm
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