These pumps are a rugged breed of submersible solids-handling pump. BJM manufactures a chopper pump designed to chop large solids and pass them through the pump without clogging. Please view the video at www.bjmpumps.com/shredder-pump-videos/#c177 to see the chopper pump in action! BJM also makes a hard metal agitator pump for handling abrasive slurries. Visit www.bjmpumps.com to learn more.