The Extreme Outback Pulley Block allows you to double the capacity of your winch. The unit has a greaseable zerk fitting for ease of maintenance and long service life. Capacity is 17,500lbs. The unit is machined with extra side clearance so mud and debris does not jam the unit while in use. The Extreme Outback Pulley Block does not have to be disassembled for cleaning or service. Just hose it off, grease it and you're done!