Circular rotary replacement blade for Olfa 28mm rotary cutters used for quilting, sewing, and general crafts. Ideal for small-scale projects and tight corners. This blade is made of high quality tungsten tool steel for unparalleled sharpness and superior edge retention. For Original 28mm Rotary Cutter (RTY1) and Deluxe 28mm Rotary Cutter (RTY-1/DX). 2 blades per pack. Good For: general quilting, sewing and craft projects. Can be used in industrial applications. Smaller size makes it ideal for curves and cutting out patterns.