Introducing a steel reinforced hook. Features of attachment relief for ladder work • Safe • Rescue • Attachment relief for ladder work. • Can be installed by any manufacturer with a series or double ladder with a step between 9.8 - 13.8 inches (25 - 35 cm). Made of aluminum and lightweight. One-touch installation and integrated ladder. The distance between the left and right hitting the roof is wider than the ladder width for increased stability. Special rubber prevents slipping. The left and right feet hit the roof slide up to 5.9 inches (15 cm), so it is stable in uneven areas. For maintenance of gutter repairing and inspecting industrial shops, tiled shops, painting industries, sign shops, and appliances. Cannot be used with ladder or stepladder. *Ladder not included.