ProLink XXL Heavy Duty Winch Shackle Mount Factor 55The ProLink is Factor 55's original shackle mount. Trusted and used by first responders worldwide, ProLink is easy to install and allows winch owners the ability to replace the vehicle's winch hook with a stronger shackle D Ring mount. The Factor 55 ProLink XXL is the largest and strongest ProLink winch shackle mount in production. The ProLink XXL provides winch owners with a means to replace the conventional winch hook with a safer and stronger screw