[TowerTalk] Tool name?

[K7LXC at aol.com]

Howdy, TowerTalkians --
 
    What is the name of the closed-end, single  sized wrench that has a 
plastic inner ratchet and you can reverse it by  moving a little lever? I've used 
them but I don't know what they're called.  Tnx.
 
Cheers,
Steve    K7LXC
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