Kratos - 3.5m Length Helixon-S Retractable Wire Rope Fall Arrest Block 3.5m - Vertical & Horizontal3. 5m Length Helixon S Retractable 4. 8mm Wire Rope Fall Arrest Block with Polymer Casing For Vertical and Horizontal Use Length 3. 5m (286 1520 20). High impact resistant polymer casing. x2 Swivel rotations. Smaller and lighter design. Horizontal and vertical use approved. Complete with swivel snap hook with load indicator at attachment end and karabiner at anchorage end. Equipped with a carrying handle, wire rope brush and a window on the casing