Upgrade a compatible outboard or sterndrive with the Turning Point 31501931 Prop Express Four-Blade Propeller. It features an innovative design and incorporates quality materials to deliver efficient and long-lasting operation. This durable Turning Point propeller is made from 15-5 stainless steel, a metal that gets harder and stronger with age. Higher rake angles tighten the vortex it produces, adding to boat lift and overall performance. The result is improved handling and lift through aggressive rake and cupping. This four-blade stainless steel propeller also features tuned, progressive pitch angles to accelerate and channel water to minimize slip. Tuned vents in its barrel provide for fast hole shot.