Harken 25mm Wire Halyard Block with Shackle

The Harken 25mm Wire Block is built to carry wire halyards and high-strength control lines, a lightweight, low-friction option for boats running wire rather than an all-rope halyard system.

At just 28 grams (1 oz), it adds almost no weight aloft, an important detail on a wire halyard block that typically lives at the masthead or another high point on the rig.

It handles wire up to 2mm and line up to 4mm, rated to a 1,000-lb maximum working load with a 2,000-lb breaking load, and the included shackle makes for a straightforward attachment point. Explore more sailing hardware.

• Built for wire halyards and high-strength control lines
• Just 28g (1 oz) total weight
• Handles wire up to 2mm, line up to 4mm
• Rated to a 1,000-lb maximum working load