Link: http://HarborFreightReviews.com

Item: Aluminum Rafter Angle Square
Item number:7718
Retail price: $3.99
Frequent sale price: $1.99
Target price: $1.99
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What can we say about a 7 1/4" aluminum square? Well, that it's great for 'squaring up' your miter saw, bench-top sander, drill press, woodworking band-saw, and other power tools that have tables and miter gauges. And if you find other uses for it, well, you've more than gotten your money's worth for this thick (as in won't bend easily) aluminum square at Harbor Freight's frequent sale price of $1.99. What you won't do is draw straight lines: the gradations are etched into the aluminum edge of the rule in a manner that creates dips along the edge, thus preventing drawing smooth straight lines. Too bad, otherwise this small square is perfect. But at $1.99 it's a great buy just for checking the alignment of the tables on your bench power tools (You do that, don't you?), and if you actually use it for making rafters, so much the better.

Bottom line: If you own bench-top power tools, you need this handy little item to check their alignment.