The Boa Constrictorweblock with slow release and steel shackle is a winning combination for your tension side anchor. With the webbing pretensioned in the webbing lock you can increase the tension by tightening the slow release or using a buckingham 2:1 system. Then easily and safely release the tension in your slackline or highline by unwrapping the slow release.
For a 30-meter or longer slackline, recommend pairing this with a strong 2-meter sling.
