Never heard of the name, but it striked an interest as I'm really close to Seattle Tool Canada's HQ.
Reading the type of grammatical errors on the .com site makes me automatically think that it's an oriental operation.

The picture and accompanying link doesn't even match on certain products. This site is definately a work in progress.
The .ca site is a TON better though; a lot more user-friendly. There's definately more time and effort put into this one.
I looked into their "Partners" link and found it interesting that ProFormance Racing school is sponsored by them--I know friends who have gone to many track days organized by ProFormance.
I chuckled when I saw the "Digital Lock Toolbox"; think of what would happen if the electronics get buggered up.
I also noted that their adjustable wrench are the same as Toptul's--mostlikely sourced from the same factory in Taiwan.
I find it odd that these spanners have no markings on them.
Given my promiximity to this company, people probably think that this might be a free advertisement.....well, I ought to mention that I have absolutely no affiliation with them!