Electronic stops with magnetic sensors to prevent damage from cover overrun.Ītom brings many of the best features of other models into a smaller package, for pool designs not possible with a standard offset motor. Composite rope reel, for great strength and corrosion resistance. Reversible drive gear, allows easy switching of the motor side. The Infinity 4000 is full of innovative features that set it apart from other AutoCovers. Mechanical Torque limiter to prevent damage from cover overrun. Drive train enclosed within the rope reel to keep it protected from dust and dirt. Sealed stainless steel pulleys for long life and function. Marine-grade, anodized aluminum brackets and rope reel. The CS3000 has been been around for two decades, and has shown to be one of the most reliable Autocovers on the market. Mechanical torque limiter to prevent damage from cover overrun. 1″ diameter, enclosed drive train, twice the size and strength of competition, enclosed within the rope reel to keep it protected from dust and dirt. Mechanism, rope reel, gears, pulleys, all stainless steel. Only full stainless steel mechanism on the market, with the strongest drive train, and biggest pulleys, for longer rope life. Eclipse is the best Autocover that money can buy.