Good Measure by Amanda Murphy Low Shank Every Angle in 1/8" thickness. Non-Slip Surface Good for Stitch-in-the-ditch, Echoing, parallel lines, and cross- hatching. Can be used with domestic machines.

These rulers are for low shank thickness.

Amanda Murphy Good Measure Quilting Rulers feature a non-skid backing and two colors of lines for ease of quilting.  Directions are included.