Allows standard mounting brackets on extra large crossbars Compatible with with River Quiver Models These extended mounting bolts are used with a Spacer Kit or used to fit larger than normal roof rack bars. These bolts are an extended version of the standard mounting bolts that attach the River Quiver mounting bracket to your roof rack. They are 1'' longer in case you have installed a spacer kit with your River Quiver fly rod holder or have larger than normal crossbars. These bolts come in a set to accommodate Standard mounts on either the 2-Banger or 4-Banger River Quivers. 2-Banger Set Includes: (4) Extended Bolts 4-Banger Set Includes: (8) Extended Bolts