The 20mm Dynamic Block for Webbing Attachment is an essential component for dinghies, windsurfing, kitesurfing, and other activities that use smaller lines. Its lightweight yet durable design features twin rows of stainless-steel ball bearings on a stainless-steel rail, providing superior load-carrying ability and longevity compared to other bearing systems. This block also has a specially designed body for easy attachment via a 10mm webbing strap, making it ideal for sewing onto sails, canvas, or harness lines. Additionally, the large central rivet in our 20 & 30mm blocks not only reduces weight but also offers a rope-friendly attachment, perfect for use in a cascade system.