These ISC heavy duty rigging blocks combine the convenience of a spring loaded upper pin with a captive bushing and light-weight design.
These ISC heavy duty rigging blocks combine the convenience of a spring loaded upper pin with a captive bushing and light-weight design. ISC Rigging Blocks have colour-coded Side Cheeks and Pulley Wheels, helping the user to easily identify the correct Block for the task. ISC have introduced a new fixed bollard dimension, which allows the user to fall in-line with rigging standard practice, whereby the Anchor/Topping Strop should be twice the Strength of the Working Line.