Quilt Ruler Upgrade Kit for 12, 12-1/2, 24, or 24-1/2 Inch Acrylic Rulers by Guidelines4Quilting

From Guidelines4Quilting, this Quilt Ruler Upgrade Kit includes Guide Lock Strips to provide accuracy in measuring and Grip Strips to eliminate ruler slips while cutting. Both the 12 inch and the 24 inch guide will stay exactly on the measurement line you set it to no matter how much fabric it butts up against — resulting in even faster, mistake proof and more consistently accurate alignment. Attach the six peel and stick Grip Strips, each 11 3/4 inches long, to prevent to your rulers from slipping while you cut. Made in the USA, and works for both left-handers and right-handers.