The Creative Grids 2 Peaks in 1 Triangle Ruler makes creating triangle-in-a-square blocks effortless. This USA-made acrylic ruler features a unique keyhole cutout that lets you cut both triangles with one tool, plus a non-slip grip that holds steady while you work. Clear black and white markings, 1/4" seam allowance guides, and included strip sizes take the guesswork out of your project. Comes with step-by-step instructions and a QR code linking to video tutorials. Measures 7" x 13".