45mm Rotary Blade Replacement Bulk Pack 50ctOur unique sharpening system has created a blade that is in for the long haul. The blades will last approximately 3 5 times longer than ordinary blades. To maximize your blade life and efficiency in cutting, use it with our ergonomic rotary cutter and one of our commercial grade mats. When you replace a blade, make sure you discard the old one in a safe manner. A good way to do this is with one of our blade tins.