Euro Marine Trading Twin Halyard Blocks -
Twin Halyard Blocks are specially made for a 2-to-1 main halyard. The very small sheave is aluminum with a Composite Fiber bushing. The body is constructed from High-Resistance Nitronic 50 stainless steel. Four sizes for breaking loads from 5,720lb. to 22,000lb. for boats up to 70'. Self-locking captive pin.