Description: High quality professional grade 18mm diameter rotary cutter circular & straight edge blades for quilting, scrapbooking, leather or cutting, diy patchwork craft, etc Made of heavy duty alloy & steel material, very sharp, high hardness, long life cycle, Used for cutting paper, Leather, , Film, , Fabric, Etc Great accessories DIY patchwork craft leather sewing quilting cutting projects All our rotary cutter blade Fits your rotary cutter - compatible with all rotary cutters,including Fiskars, Olfa, and . Low price quality assurance - one pack of 5 pieces blades Specification: Material: Alloy, Steel Diameter: Approx. 18mm; Hole: Approx. 5mm; Thickness: Approx. 0.3mm Package Includes: 5 Pieces Rotary Cutter Trimmer Blades Note: Please allow a little size error due to manual measurement. Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the item's color may be slightly different from the pictures. Please understand.