Interlocking slide guides offer enhanced strength and smooth, bind-free travel. Pre-greased stainless steel lead screw for smooth operation. Handles either 2- or 4-stroke engines to 300 HP or 585 lbs.. Standard B.I.A. mounting pattern for simplified installation. Aircraft grade 6061-T6 aluminum alloy provides light weight, high tensile strength and corrosion resistance. Precision machining from work-hardened, extruded billet for strength. Military standard anodized surfaces for corrosion resistance. Stainless steel hardware. 2 year warranty