The Landcruiser 300 series is a tall vehicle, and getting up to your roof rack is not super easy.  Climbing up there and getting back down is difficult and can be dangerous.  Offroad Animal has you covered, with this stylish ladder that clamps on to the rear door with no holes drilled.  Great for climbing up to your roof rack to secure all your gear. Works directly off the door so works with any roof rack. 
This ladder will suit all LC300 vehicles 2021 on