Clover 45mm Replacement Blade 5 Count 7509. Clover Rotary Cutter Blade Refills make changing the blades safe, quick and easy. Blade comes in a protective cover for safe handling. Make sure to have plenty on hand and keep out of reach of children. 5 Replacement 45mm Rotary Blades in Package. For Clover 45mm Rotary Cutter (CL7500). CHK-7509CV