Allen 20mm Dynamic Block with Swivel Head

The A2020 is our favored low-friction, rapid-rolling, compact pulley with a swivel head. Its lightweight yet sturdy design makes it perfect for use in dinghies, windsurfing, kitesurfing, and other activities involving smaller sized lines. The Dynamic line of blocks is the optimal choice for applications that require continuous movement of the sheave. The built-in swivel pin allows for rotation of the block once attached, making it suitable for situations where the pulling forces may change direction. Please note that the swivel is not lockable. Our patented bearing system sets our Dynamic Blocks apart, utilizing twin stainless steel ball bearings on a stainless steel rail for superior load capacity and durability compared to other blocks that use plastic rails. Our 20mm and 30mm blocks feature a large central rivet that not only reduces weight but also provides a rope-friendly attachment point, ideal for use in a cascade system.