Fury, a revolutionary propeller that will measurably improve acceleration and top speed on many bass boats powered by 200+ horsepower outboards. The Fury is Mercury's first bass boat propeller to utilize the added strength and durabilityy of the new X7 alloy. This patented new alloy allowed Mercury's Propeller Engineers to develop a propeller design that far surpasses the limits of conventional stainless steel. The X7 alloy is 30% stronger and 4 times more durable than conventional stainless steel. The Fury boasts an impressive 1.4 MPH improvement to top speed and 12% faster acceleration vs. a conventional stainless steel prop of the same pitch.