I own this wrench and it works as well as the B&D one , and is 100 years old !
I will admit that these are very hard to find these days and the size I have ( 5 7/8 " long ) sells for about $200 due to rarity !
It has a push button which allows the jaw to close on the fastener easily , the final adjustment is made with the thumbscrew .
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http://www.papawswrench.com/images/Athol1.jpg[/img]
