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Side View of The Bottomless Wrench
Side View of The Bottomless Wrench
 
  The BottomlessTM wrench design uses a much stronger heavy duty snap ring which is mounted on an outwardly facing surface of the gear wheel, not in the hole of the wrench head.
As such, the ring can expand outwardly when a socket is inserted into the wrench head. This freely permitted expansion allows the heavy duty snap ring to snap back forcefully into the holding grooves on a socket when it is inserted into the wrench. As a result, the heavy duty snap ring firmly holds the socket in the wrench head, much more firmly than is possible with conventional pass through wrenches. Would you like to see more information or see more pictures of The BottomlessTM wrench?

U.S. Patent No. 7,380,481
 
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