The Gemlux Triple 500lb GEMLOX Pair w/ Leash Lock is ergonomically designed and allows for no halyard creep. A 2-3mm diameter halyard line is recommended. The unique cam-lock leash lock system ensures your dredge tether is always secure and ready to grab at a moment’s notice when bringing in your dredge. This GEMLOX set comes with 6ft of quality custom rope.