The Allen 20mm Articulating Triple High Load Block features a stainless-steel sheave, providing faster rolling speeds, higher working loads, and lower friction compared to the standard acetal sheave. This innovative design allows for free articulation between each block, ensuring optimal alignment with the rope angle. Our Dynamic range, equipped with our patented twin-row bearing system, offers superior load-carrying ability and longevity. Additionally, our patented Ultra-Strap design, made with a unique coining process, provides reliable and durable performance while being rope-friendly. With a large central rivet, our 20 and 30mm blocks are lightweight and ideal for use in a cascade system.