Cutex Sewing 4" Round Replacement Blade For Stand Up Type Electric Fabric Cutters 4" Diameter, Round Blade for Rotary Fabric Cutting Machines This is a high quality 4" round knife blade manufactured from Hi-Grade, High Speed Steel This replacement blade is compatible with 4" rotary electric fabric cutters from many different makers including Eagle, Gemsy, Jiasew, TPC, Reliable and many more