Comparison : Item # S0164-HR05, 3/16 Inch (in) Size A 17-4 PH Stainless Steel Halyard Shackle with Key Pin
Item # S0164-HR06, 1/4 Inch (in) Size A 17-4 PH Stainless Steel Halyard Shackle with Key Pin
Item # S0164-HR08, 5/16 Inch (in) Size A 17-4 PH Stainless Steel Halyard Shackle with Key Pin