4 Blades That Re-wrote the Rules. The props that put the "four" in Perfourmance! Unprecedented hole shot, lift, handling, ease of steering, and rough water stability. No top-end speed loss you experience with other manufacturers' 4 blade propellers - keeps 3 blade top end speed. Lifts the entire boat higher out of the water. 4 blade Dual Geometry prop that has 3 blade top end speed with fast hole shot and unmatched handling. Stronger materials, more corrosion resistance, higher gloss and new casting technology. Includes Turning Point's cutting-edge designs. State-of-the-art casting technologies and race-proven finish and tuning practices to the Express line of props. Proprietary stainless steel, TP17T. Propellers fit Cox®, Evinrude®, Honda®, Johnson®, Mariner®, Mercury®, Mercruiser®, Nissan®, OMC®, OXE®, Parsun®, Suzuki®, Tohatsu®,Volvo Penta®, & Yamaha® Outboards and Sterndrives. Uses 500 Installation/hub kits for applications under 200hp or 700 series Installation/hub kits for engines 200+hp.