Comparable to Jabsco #50070-0040 and #50070-0200. Allows easier removal of flexible impellers from pumps. Tighten the side grips onto the impeller hub and turn the center screw shaft to pull the impeller out of the pump. Use part number 660020 for impellers 3-1/16" to 5" diameter and part number 660040 for impellers 2-1/4" to 2-9/16".