Diagonal Seam Tape by Cluck Cluck Sew
Need help getting your diagonal seams straight? This product would be perfect for you!
It's been a game changer for me when I'm chain piecing my HST (half square triangle). This tape extends your needle plate markings so lining up your fabric and making the perfect seams are easy.
It's sticky, but won't leave behind nasty tape residue. Remove it when you're done and get a fresh piece when you need it.