These couplers are replacement parts of the set that came with your River Quiver fly rod holder. This product comes with the bolts included. 

If you need a replacement of this part, absolutely DO NOT drive anywhere, not even to that sweet little honey hole down the street. The coupler is designed to hold the aluminum rod tubes together. They are made from the same high quality 6063-T5 anodized aluminum as the rod tubes.

 2-Banger Set Includes:
1 x 2B Coupler + 4 x Standard Mounting Bolts

 4-Banger Set Includes:
1 x 4B Coupler + 8 x Standard Mounting Bolts