12V Dual Direction Solenoid (0052531) by Lewmar. For Sprint 600 & 1000, Horizon 400/600/600F/900 & 900F, Pro Series, and Pro Fish Windlasses. This product is designed and manufactured to address your marine needs. It is made to help you let-out and heave-up your boat equipment, such as an anchor or fishing trawl. Crafted from premium materials to strict quality standards, this product will serve you for many years to come.