Abstract: An open impeller for a submergible pump for pumping abrasive fluids. The impeller has a cover plate, a hub and at least two spirally swept blades, each blade having a leading edge, a trailing edge, and a lower edge extending from the leading edge to the trailing edge and separating the suction and pressure sides of the blade. At least one blade includes a winglet at the lower edge projecting from the suction side, located radially outside an inner radius of the impeller, and extending circumferentially to the trailing edge at the suction side at a maximum radius of the impeller. The lower edge and winglet lower wear surface are configured to be located opposite of and facing a pump wear plate. The inner radius is equal to the largest of the maximum radius of the impeller multiplied by 0.6, and an inlet radius of the impeller multiplied by 1.2.