If you are not a tool geek, read no further.

When I recently made a run to Sears to gather some needed Craftsman
upgrades, I ran across something I had been considering for years.
Since the last time I was there a year ago, Sears started carrying the
"ratcheting" open end wrenches. Similar wrenches have been made by
Facom tools for some time, but they are very expensive and only come
in combination with a box wrench, which I already have. These
Craftsman wrenches provide a full set from 10 to 19 mm in just for
wrenches. So, no paying for redundancy and no overstuffed tool box.

They grab the fastener in one direction and let it go in the other, so
they act like a ratcheting box wrench. They make certain things a lot
easier and quicker. They actually provide better fastener grip than a
standard open-end wrench. Best of all they are $23.00 a set right now.

<http://www.sears.com/shc/s/p_10153_12605_00921936000P?prdNo=1&blockNo=1&blockType=G1#reviewsWrap>

Jim