X-Acto Refill Blade - #2 - 1.9" - Straight Style - Carbon Steel - 5 / Pack - Silver Sold as 5/PK. Heavy-duty blades are designed to cut through medium-density materials while maintaining an exceptional level of precision. The medium-weight, No. 2 blade features a considerably fine point for a cardboard knife, making this an extremely versatile cutting tool. Use with a variety of materials, including cardboard, plastic, most papers, hard and soft wood, rubber, foam, vinyl, and more. Knife blades are crafted with sharpened carbon steel for a reliable cut and a strong blade