Factor 55 ProLink Winch Thimble Shackle- Billet Aluminum, Powder coat FinishProLink Winch Shackle Mount Red Eliminate the winch hook and replace it with a safer and stronger D ring shackle thimble from Factor 55. These thimbles, aka ProLink, work with steel cable or synthetic winch rope and there is no splicing required making installation only a few minutes. Made from billet aluminum construction these come with an upgraded titanium shear pin. Fits standard 3 4 Inch D ring shackles. Bottom Rubber included. Specifications