Upgraded Patented Design: Features a 30° angled edge with 1/4, 1/2, and 3/4 seam allowance lines, offering versatility for quilting and garment sewing. Heat-Resistant: Withstands temperatures up to 428°F/220°C and tolerates short - term ironing up to 536°F/280°C. The ruler will remain hot for a few seconds after ironing. Non-Slip Surface: Textured finish securely grips fabric, preventing slips while pressing hems, folds, or pleats. Clear Imperial Scale: Marked in inches for precise measurement and alignment. Translucent design allows you to see fabric underneath for accurate positioning. Durable & Practical Size: Measures 10 x 2.5 inches, lightweight, reusable, and perfect for hemming, seam pressing, quilting, and DIY sewing projects.