Bloc Loc Flying Geese 1.5" X 3" Ruler
The Bloc Loc rulers for squaring up half-square triangle squares and flying geese have a beveled groove that locks onto your seam. This prevents rocking and slipping, increasing your speed and accuracy, and they're safer to use. You can put less pressure on your rotary cutter because the ruler won't slip. Simple, easy-to-read lines are extremely fine, so this also helps you get a more accurate cut. You'll be able to square up half-square triangles and flying geese in seconds. They're also made in the USA!