There are 45 and 90 degree mat cutters available from Logan.  See them
at Dick Blick Art Supply,

http://www.dickblick.com/zz171/15/products.asp?param=0&ig_id=1024

No affilitation, other than I have the 45, but not the 90.

"Foster, Jim"  from Minnesnowta wrote:

> They don't cut at a 90 deg angle. Different ones cut at
> different angles to get varying amounts of edge showing on
> the mats.

-- 
Kirk Eppler who's got his daughter trained to say Minne Snow Taaa as 3
words.
Eppler.Kirk@g...