The A2020 is a professional, low-friction pulley with a lightweight and durable design, ideal for smaller diameter lines in activities such as dinghies, windsurfing, and kitesurfing. Featuring our patented bearing system and a threaded pin fork head, this Dynamic Block offers constant sheave movement and a long lifespan. The central rivet on our 20 & 30mm blocks reduces weight and provides a rope-friendly attachment for use in cascade systems.