The Antal DV Jammer for D14mm Lines Standard is a robust and powerful solution for controlling very thick control lines (14mm) on large sailboats. Its low-friction design, "Double V-Grip" system for secure line holding, and compatibility with D14mm lines make it a popular choice for sheet control of very large sails, halyard control for mainsails or very large sails in some cases, and other control line applications requiring exceptional strength and reliable grip for very thick lines.