Harken Small Boat Endstops and Trim Caps Use 173 and 174 endstops for small dinghies and low-load situations. The 446 line-shedding endstop is low-profile and snag-free. The 263 and 264 heavy duty endstops absorb the shock loads of unintentional jibes and are used on larger dinghies and small keelboats. Use 2722 and 2723 trim caps to finish track ends when using control block assemblies. Sold in pairs. Fasteners not included.