The "quick triangle" is particularly popular for patchwork using fabric remnants Squares can be cut quickly and easily from fabric strips into two or four triangles without complicated calculation and in the process the seam allowances are taken into account. The transparent, resilient plastic ruler with its black and yellow grid markings and a choice of a metric or imperial scale make it possible to mark both dark and light fabrics accurately. The grid is marked in 0.25 cm intervals, offering even greater precision.