Safety UpgradeSMOQIO ladder roof hooks secured by bolts, preventing the roof ladder from wobbling and sliding, ensuring stability in use; which provides lock nuts for secure, anti-loosening and safety. Reliable ladder safety anchors make your roof works safer. Strong Stability DesignLadder roof hook is made of durable rectangular steel tube structure, which has superior bending resistance compared with sheet metal, preventing deformation during use. Ladder hooks for roof have a rust-resistant coating for long-lasting. Quality welding ensures the stability of roof hook, with 2 pack weight capacity of 600 lb, meet your needs when working.