Barton Marine Size 3 Stanchion Lead Block - Single w/Becket and Cam Cleat. 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 significant diameter brass bearing ensuring free running under the highest loads. The unit will fully rotate about the swivel head to match your pulling angle.Cam cleat will secure the line into place. Block attachment to stanchion is by means of screwing together the integral Stainless Steel strap. Specifications for Barton Marine Size 3 Stanchion Lead Block - Single w/Becket & Cam Cleat: Manufacturer: Barton Marine Color: Black Package Contents: Barton Marine Size 3 Stanchion Lead Block - Single w/Becket & Cam Cleat Barton Marine N03591: Size 3 Stanchion Lead Block - Single w/Becket and Cam Cleat