SmartTrack Blade Housing Rear Mount (ST3816)Its quick to raise and lower the blade with this tiller and rudder box assembly, due to an internal leverage rod. It protects the blade in an upright position when not in use and has adjustable spring tension that keeps the blade down in the water when in use. All extremely rugged and corrosion proof extruded alloy parts are machined for precision fit, and coated with Teflon 6061 T6. SmartTrack Rear Mount installs on kayaks with a vertical, flat