Harken 16mm Block w/Swivel

The Harken 16mm Block w/Swivel is a precision rigging component designed for sailors and boaters who demand reliable load distribution across halyards, sheets, and control lines. This compact block serves as the workhorse of modern deck hardware, whether you're managing mainsail trim on a cruising sailboat or optimizing halyard angles on a racing dinghy.

Built by Harken, a brand trusted across professional racing fleets and recreational cruisers alike, it handles the dynamic stresses that come with years of coastal and offshore use. The 16mm sheave diameter is engineered to accept standard rope diameters while minimizing friction and wear—critical for making repeated adjustments in heavy wind or managing long passages. The integral swivel connector allows natural line rotation, preventing twisting that degrades rope integrity and rigging efficiency over time.

At just 0.1 lbs, this block adds negligible weight aloft, yet its precision ball-bearing design and marine-grade construction deliver the durability expected in saltwater environments where corrosion and fatigue are constant concerns. This block suits both competitive sailors optimizing sail controls and cruisers seeking dependable, low-maintenance rigging hardware. Its compact profile makes it ideal for installations where space is limited, such as tight boom gallows or staysail rigging systems.