Spinlock Jammer Spinnaker BlocksThis jammer block is for situations where a fixed foot block cant help: peeling spinnakers, or changing a sheet winch Features Controlled spinnaker handling Attached with webbing strop, positioned on a toe rail or padeye No drilling and no clutter on deck CAM profiled to hold loads up to 20% of the block SWL Plain bearing sheave provides smooth running at low loads Excellent durability at high loads Strop allows fullest rotation for spinnaker sheet