Hand Tools: The original SPEED® Square
Scott Gibson, Contributing Editor
The SPEED® Square makes laying out roof rafters especially fast and reliable. A lip along one edge of the tool can be hooked over the edge of a board, making the square a sturdy guide for cutting framing lumber or trim with a circular saw.
At 7" x 7", it also takes up less room than a conventional square.
There are knock-offs aplenty, but this is the original. It was available on-line from Tools Plus in September 2004 for about $8.