This clever clamp uses surprisingly strong suction to grasp and hold firmly onto unwieldy quilting rulers. Simple mechanics grip onto any flat (un-textured) surface. Perfect for holding, cutting and moving your quilting ruler. To remove, just release the handle and it comes right off leaving no marks. Once you try this clever device, you'll never want to use your ruler without it. Quilt/Craft Clamp, by CutterPillar Glow.