Shimano 600 Ax Roller-cam Bicycle

Shimano 600 AX roller cam bicycle brakes. Includes the original cable adjustment barrels. The brakes move smoothly and function as designed. There is some wear on the brake pads. The brakes have been used and show signs of wear and age. One of the black plastic snap ins to indicate front has a crack in it as seen in the photos. Please review the photos as they are part of the description.