Sea-Dog Line is a 3rd generation family company with a history of satisfied customers stretching back to the company's start in 1933. The company is the recipient of multiple industry awards for quality and efficiency. 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".