This jammer block is for situations where a fixed foot block can’t help: peeling spinnakers, or changing a sheet winch

• Controlled spinnaker handling
• Attached with webbing strop, positioned on a toe rail or padeye
• No drilling and no clutter on deck
• Plain bearing sheave provides smooth running at low loads
• Excellent durability at high loads
• Strop allows fullest rotation for spinnaker sheet use 
• CAM has three distinct operating modes