SpinRX Swivel Anchor PulleyZigco LLC proudly introduces the SpinRx. The SpinRx was designed out of necessity, and eliminates anchor rope twisting while still providing a 2 to 1 mechanical lifting advantage of a pulley, which separates this pulley from any other boat pulley on the market. The SpinRx is CNC machined from aerospace grade aluminum and hard anodized for corrosion and wear resistance. All hardware is stainless steel for increased corrosion resistance, which means the