I've had a few designs lately that have called for half square triangles. Like anything else I try to make them as perfect as I can, so I get out my little ruler and start marking from one corner to the other. Then I remembered I had ordered a template a while back that would allow me to make them without all that marking.
Clearly Perfect Angles is a vinyl template measuring 8½" x 11" that "clings" to sewing tables so you can sew perfect 45° angled seams.
This is great - I saved so much time.
I know I could probably just eyeball it and get a close 45 angle but I really like percision.
And it is colour coded for both 1/4" and 5/8" seams.