Designed for Hauling Curtains not Lifting. Fitted as Part of a Continuous Loop Hauling Line. Can be Hand Wound or Electrically Operated. To be Floor Mounted. Designed for hauling curtains. These drives are fitted as part of the continuous loop hauling line on the Doughty Six track curtain rail. Each drive unit incorporates a hauling line tensioning system.. doughty fixing-doughty trussing-doughty curtain drive