| 
>>Maybe I'm a wimp, but I've never broken or bent an end wrench.  
I've never broken one either, although I've split a few el-cheapo sockets.
The main problem I've had with open-ends is having them become too "open",
i.e. my 14mm open-end is now about 14.3mm and so is more likely to
round off a bolt head. I suppose that the trade-off is between making them
so hard that they break and not hard enough to break so that they give. 
   Lee M. Daniels         Laboratory for Molecular Structure and Bonding
   daniels@tamu.edu                                 Texas A&M University
   http://acs.tamu.edu/~lmd1191
 |