Irudek Sekurblok 20 retractable anti-slip, twine diameter 4,5mm, blue, 20m Retractable fall arrester with 20 m long strap. This device stands out for its ease of use, avoiding the need for specific knowledge. Equipped with mechanical brake for fast and safe braking. In case of a fall, the device limits impact force to 6 kN. The device is certified for vertical work with a maximum load of 140 kg. It features a swivel ring at the top to avoid entanglements and a rotating gancho hook with a 20 mm opening. Easy to use, the device provides the user with the length required for the work, remains tense and helps avoid any type of fall. They are equipped with an Irucheck NFC chip for efficient equipment management and inspection.