eTool : Scaffolding - Supported Scaffolds - Ladder Jack | Occupational Safety and Health Administration
VOUNOT 3-in-1 Aluminium Scaffolding Ladder, Stable, Multifunctional, with Work Platform: Mobile Scaffolding on Wheels with Tool Holder, 120 x 40 cm, Maximum Load 150 kg, 6 Positions, Grey : Amazon.co.uk: DIY & Tools
How to use ladder jacks? | Ladder, Roof maintenance, Craftsman style homes
Clow 5 Way Combination Work Platform Ladder direct from the Clow Group