The Allen 30mm High Load Dynamic Block with Fork is designed for dinghies, windsurfing, kitesurfing, and other applications that require smaller diameter lines. This upgraded block boasts a stainless-steel sheave, offering faster rolling speeds, higher working loads, and lower friction compared to standard acetal sheaves. Its bearings feature a patented system with twin rows of stainless-steel ball bearings on a stainless-steel rail, providing superior load-carrying ability and durability. The block also includes a removable clevis pin for easy attachment and a large central rivet for a rope-friendly tie-off point in a cascade system.