The "Boa constrictor" is our strong and lightweight weblock that easily pre-tensions. It is perfect for use in high tension slacklines and longlines. A captured pin ensures it won't be lost or left behind.
After 4 years of research, testing, and development we are proud to present the Viper Slackline "Boa constrictor" weblock. The Boa weblock integrates perfectly with our slow release, holding the tension of your slackline using friction. When setting up longer lines, higher tensions are best achieved using a combination of our Grippex and Rolley to setup the Buckingham 3:1 tensioning system.
