Experience the exceptional performance of the Harken 57Mm Aluminum Low Load Black Magic Block with Swivel, a top choice among Big Boat racers and cruisers. Designed to deliver unparalleled simplicity, reliability, and speed, this block is engineered to excel in demanding sail control systems, including mainsheet, runner, halyard, and spinnaker applications. At the core of its design lies a center cage that efficiently separates and aligns Torlon roller bearings, minimizing friction and ensuring a silky-smooth operation.

The shackle block features a unique locking mechanism that secures in two directions, allowing for effortless adjustments while preventing line twisting. Furthermore, the swivel functionality ensures that the block rotates freely, maintaining optimal alignment with the load, even in the most extreme conditions. This innovative design is complemented by the use of high-quality materials, including 316 stainless steel shackles and 17-4 PH stainless steel head posts, ensuring corrosion resistance and exceptional durability.

The Harken 57Mm Aluminum Low Load Black Magic Block with Swivel boasts impressive specifications, with a 57mm sheave diameter, an overall length of 119mm, and a remarkably light weight of 154g. The block's performance is further enhanced by the 6mm shackle pin and the ability to accommodate lines up to 12mm in diameter. With a maximum working load of 7/16kg / 1655lbs and a breaking load of 1500kg / 3300lb, this block is designed to withstand the most demanding loads and stresses.

What sets the Harken Black Magic Block apart is its dedication to simplicity, reliability, and performance. By combining advanced materials and innovative design, this block offers an unparalleled sailing experience, whether you're racing or cruising. Whether you're tackling the open ocean or navigating coastal waters, the Harken 57Mm Aluminum Low Load Black Magic Block with Swivel is the perfect solution for sailors seeking exceptional performance and reliability.

Sailors and boat owners alike will appreciate the meticulous attention to detail and commitment to quality that defines the Harken brand. With a long history of delivering exceptional sailing solutions, Harken has established itself as a trusted name in the sailing community. The 57Mm Aluminum Low Load Black Magic Block with Swivel is a testament to the brand's dedication to innovation, reliability, and performance.

Invest in the Harken 57Mm Aluminum Low Load Black Magic Block with Swivel and experience the thrill of sailing with unparalleled speed, control, and confidence. This exceptional block is sure to become an indispensable component of your sailing arsenal, providing years of reliable service and exceptional performance. With its sleek design, advanced materials, and impressive specifications, this block is the perfect choice for sailors seeking the ultimate sailing experience.