The A2030 Allen 30mm Linked Single Dynamic Blocks are perfect for low friction and fast rolling applications. Their lightweight and strong design make them the top choice for dinghies, windsurfing, kitesurfing, and other activities with smaller diameter lines. The Dynamic range, featuring our patented bearing system with twin rows of stainless-steel ball bearings, provides superior load-carrying ability and longevity compared to other bearing systems. The Becket design, with a large central rivet, offers a rope-friendly attachment and can also be used as a tie-off point in a cascade system.