MLK Series and HLK Series0.25 to 6 metric ton lifting capacities Features MLK SeriesThe Ingersoll Rand MLK family of hoists id suitable for A5H5 severe-duty use in the 0.25 to 1 metric ton range. The MLK Series is designed to be used as a high-speed protaction habit; the MLKS* is better suited for slow-speed spotting. HLK SeriesThe HLK Series incorporates a larger chain wheel to accommodate 38" diameter chain and a lower gear ratio to handle increased load capacities. HLK Series hoist capacities range from 1 to 6 metric tons and are severe-duty rated.Refer to the trolley section on page 61 for plain, and motorized trolleys.