QualityCut 10x 28mm Rotary Cutter Refill Blades Japanese SKS-7 Stainless Steel High Quality Professional Grade Rotary Cutter Blades Ten (10x) 28mm Blades Securely Packed in A Snap-close Case Multiple Sharpening Stages for Optimal Combination of Extreme Sharpness and Durability 100% Compatible with OLFA, FISKARS, TRUE CUT and Other Rotary Cutter Brands Marking Scale for Rough Measurements without Ruler. Also available in 45mm and 60mm.