The new design of the al-ko kober optima wire rope winches and the corrosion protection with a zinc-nickel coating guarantee pleasure in long-term use. the al-ko optima type 501 is twice as well protected against corrosion compared to its predecessor. Non-return lock gear ratio 3.75:1 Stroke per crank revolution: from 45-100 mm Minimum load: 25 kg with load brake This winch can be operated with rope or harness recommended drum capacity for webbing 35 mm wide: 4 meters drum capacity tape for towing 7m drum capacity for rope 5 mm: 20 meters stable base plate for universal fastening, the holes for this are available