Size 2 Double Stanchion Lead BlockBarton Marine&';s stanchion lead blocks have proven to be popular with Cruising sailors all over the World. Mounted onto the stanchion base, the stanchion lead block enables the Genoa furling line to be led back to the cockpit for easy adjustment. Ball bearing sheaves have a precision molded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads. The unit will fully rotate about the swivel head to match your pulling angle. Block attachment to stanchion is by means of screwing together the integral Stainless Steel strap.Technical Specifications Sheave - Double Sheave Size - 1-3/8" (35mm) Maximum Rope Diameter - 5/16" (8mm) Safe Working Load - 815 lb (370 kg) Maximum Stanchion (Tube) Size - 1" (25mm) *Sold as an Individual Quick Guide (pdf)Brochure (pdf)