DetailsThe Female Base Mount is part of the Quiver/Clamp Assembly. It is the plate that attaches directly to your bow. If you want to transfer your Retriever Pro between two bows and don’t want to purchase an entire Quiver/Clamp Assembly, you could buy this plate, a slab nut Z100 and 2 mounting screws Z9. Add them to the new bow. When you want to switch between bows, simply loosen the thumb screw completely and screw into the new plates on the other bow. Made in America.