On Thu, 23 Dec 2010 07:08:55 -0800 (PST), Jo
wrote:

This may be more of a car question, but I couldn't find an auto repair
group to ask. I need to pickup a last minute Christmas present for my
dad. I was going to buy him a dog-bone socket wrench. I'm not sure if
I should get the SAE or metric. I really don't understand the
difference between the two. Any suggestions? If it helps, we live in
the U.S. and most of the cars he works on were made between 1988 and
2004 with one being made in the 70s. The brands of the cars/trucks are
mostly Chevrolets and Fords.

As others have said, he probably won't even use those dogbones.
You really can't buy somebody tools unless you know what they already
have.
I second the gift card recommendation.
Sears.
I got $150 of that last year and I was in heaven.
Always tools there you want but don't have because you just didn't
want to spend the money.
With that gift card you don't have any choice but to buy tools.
Like I said - heaven.

--Vic