jdn trolleys are available for all hoists of the profi and m series: - as manual trolleys (ln) for pushing or pulling the trolleys by hand - as reel chain trolleys (lh) for moving the trolleys by unwinding the reel chain ......jdn trolleys are available for all hoists of the profi and m series: - as manual trolleys (ln) for pushing or pulling the trolleys by hand - as reel chain trolleys (lh) for moving the trolleys by unwinding the reel chain - as motorised trolley (lm) powered by an air motor standard features: - easy to install - with anti-climb and anti-drop devices - robust and with little maintenance - able to negotiate curves when only extremely low headroom is available we recommend the jdn low headroom trolleys or even the ultra-low monorail hoists where the air hoists are horizontally mounted.