https://www.jpcorry.com/jp-corry-products/werner-trade-extending-roof-ladder/
Werner Trade Extending Roof Ladder
Description
The Double Section Roof Ladder has an optimum weight frame for ease of positioning with no compromise on strength. Fitted with a heavy duty roof hook with large non-slip rubber end bar for a superior apex fit. Heavy duty locking catches and non-slip rubber sleeved support bars for roof protection. Large wheels for easy manoeuvring on roof. Compact for easy storage and transportation.
Datasheet :- roofladder