UV-stabilized, glass-filled nylon shanks are ultrasonically welded for stiffness without torsional twist or deflection. Delrin ball bearings in the rotating grips allow smooth operation. Designed as a primary handle not just as a back-up. Double-grip handles allow most sailors to increase pressure applied to a winch by 40% that s a lot cheaper than new primaries! Warranted against breakage for life Each weighs less than a pound and floats! All are lock-in style