Collection: Sheave Boxes

Allen sheave boxes, or exit blocks as they're also known, are designed to meet the demands of performance sailing, offering a choice of plain bearing or ball bearing sheaves to suit your specific application. To provide optimal durability and efficiency, we offer sheaves in a range of materials, including Acetal, stainless steel, and aluminium. Perfectly suited for halyard systems, control line systems, and general running rigging, Allen sheave boxes are built to handle a variety of applications on boats up to 30ft. Please note: Working and breaking loads depend on the installation method of the sheave box.