EZ Grip Knobs for your Scroll Frames. Ergonomic round cornered triangle knobs are easy to grip and make adjustments on your scroll frame a pleasure. Requires only half the effort compared to a round knob. Should fit most brands of scroll frames. Knobs measure 1” across each side and come packaged 4 per pack. From Yarn Tree so it is easier to #KeepOnStitchin! Beth