The cutter pump was created in order to address the urgent need of reducing clogging due to ragging. With the increased use of 'flushable' materials and extraneous cleaning products, the issue of clogging—leading to downtime, pump destruction, and pipe damage, has increased markedly. Useful in municipal, agricultural, and other markets, the cutters unique stationary and rotating blade design allows material to pass through the impeller that would tend to clog a non-cutter pump. The cutter costs a minimal amount of product efficiency and is specially designed to break up clogs and prevent ragging. The cutter is adjustable and made from special hardened metal to last in difficult service. The cutter impeller can be retrofitted on existing pumps, and won't change the external pump dimensions.