Jacob's Ladder – Superior Scaffold's equipment moving hoist system.
HBTower Folding Ladder, 12 FT Aluminum Extension Ladder with Tool Tray, 2 Platform Plates, 7 in 1 Heavy Duty Collapsible Ladder, Tall Ladder for Home or Outdoor, 330 lbs Capacity Silver - Amazon.com
Step Ladder Turned to Small Staging | JLC Online
Aluminum Staging Step Tower Ladder for Factory Use from China manufacturer - DRAGON STAGE