Material: Made from thickened steel material with a rubber handle for comfortable operation. The Hand Winch features a wire rope hole, hardened gears, wire rope drum, self locking device, stable base and sturdy spring clip. The double direction self locking device is easy to use and locks immediately when the handle stop to prevent falling hazardsHigh Load Capacity: With a rated load capacity of 1200LB (8KN), this Boat Trailer Winch can horizontally pull up to 500kg and lift up to 50kg vertically. The gear ratio is 4:1, Force 180NSpecifications: The Winch has an outer diameter of 5.20inch and an inner diameter of 1.89inch, measures 5.35inchx3.54inchx6.10inchVersatile Use: This Hand Crank Winch is suitable for various situations and can be paired with a vehicle mounted crane, tripod, or used independently. It's suitable for any situation where you need reliable and secure lifting or pulling Specification: Outer Diameter:13.2cm/5.20inchInner Diameter:4.8cm/1.89inchProduct Size:13.6cmx9cmx15.5cm/5.35inchx3.54inchx6.10inch Package Includes: 1 Hand Crank Winch Note: Please allow slightly errors due to manual measurement and different monitors.