This unique 20mm Articulating Triple Dynamic Block provides low friction and fast rolling speeds, making it ideal for smaller diameter rope applications such as dinghies, windsurfing, and kitesurfing. Its patented bearing system features twin rows of stainless-steel ball bearings on a stainless-steel rail for superior load-carrying ability and longevity. The patented Ultra-Strap design strengthens and protects the rope, while the large central rivet of the Becket attachment offers a durable and rope-friendly option when used in a cascade system.