Larry Jaques wrote in
:

On Mon, 2 Apr 2012 00:04:42 +0000 (UTC), Larry Blanchard
wrote:

On Sun, 01 Apr 2012 15:43:26 -0700, Larry Jaques wrote:

Here are some with an 0.001" accuracy, fine with me:
http://www.leevalley.com/US/wood/pag...=1,42936,42941

0.001 vs 0.006 (both per inch) and about the same price for a set of 3 -
take your pick. But the Lee Valley does sell a single square - I use my
6" square for almost everything - I've only used the 2" square on model
RR structures, and best I can remember I've never used the 4" square.

So the OP could get the single 6" square from Lee Valley for $17, which
he could save from buying a mid-priced combination square.

That's +-0.001" OAL, not per inch, BTW.

Look again: "less than 0.001" deviation per inch over the entire length of the blade".