High-strength swivel pulley block with a 1500 lb work load limit, built for precise control of control lines in sailing, racing, and other heavy-duty rope operations. Key benefits High load capacity: 1500 lb work load limit provides reliable strength for demanding applications and improves safety and control under load. Low friction, smooth operation: precision bearings and an acetyl sheave reduce friction and rope wear, making line handling easier and more efficient. Corrosion-resistant strength: 316 stainless steel shackle offers superior strength and long-term resistance to marine corrosion and harsh environments. Flexible alignment: tethered lock swivel head allows controlled rotation for optimal rope alignment and reduced twisting in variable rigging positions. Features and performance Load rating: Work load limit (WLL) 1500 lbs — suitable for heavy-duty line control. Rope compatibility: Bearings designed for use with 12 mm diameter rope for smooth, reliable running. Sheave material: Acetyl sheave provides low friction, high wear resistance, and long service life. Shackle material: 316 stainless steel shackle for high tensile strength and corrosion resistance. Swivel head: Tethered lock head permits rotation as needed while keeping the head secured. Why customers choose this pulley block Reduces effort and rope wear through low-friction bearings and acetyl construction. Increases reliability and safety with a clear 1500 lb WLL and robust 316 stainless hardware. Improves rigging alignment and versatility with a lockable swivel head. Typical applications Sailing and racing: control lines, sheets, halyards, and other deck rigging where load, speed, and low friction are critical. Marine and deck hardware: rigging tasks on small to mid-size boats that require corrosion resistance and dependable load capacity. General heavy-duty rope control: outdoor lifting, hoisting, or tensioning applications that use 12 mm rope and need smooth operation and secure swivel attachment. Materials and compatibility at a glance Shackle: 316 stainless steel (high strength, corrosion resistant) Sheave: Acetyl (low friction, durable) Bearings: matched to 12 mm rope diameter WLL: 1500 lbs Head: tethered lock swivel for rotation and security If you need a compact, durable pulley that handles heavy loads, minimizes rope wear, and adapts to changing rigging angles, this pulley block delivers reliable, corrosion-resistant performance for demanding marine and rope-control applications.