For better traceability and inspection recording the RedBlock is marked with the unique production number.
Highly efficient prusik pulley. This has special side plates for use with a prusik friction hitch. Large diameter sheave (51mm) mounted on ball bearings for low friction, high efficiency. The clipping slot is large enough to accept 3 typical karabiners. For use with 7 to 13mm ropes.
4kN x 2 working load
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Established in 1977