The B300 series one-shot benders have a bending saddle that adapts to the cylinder shaft via thread. The head of the saddle locks into the bending shoe with the lock pin. A12 saddle is for use with 10 ton cylinders and the A29 saddle is for the 25 ton cylinders. If you need to purchase the cylinder separately as a replacement item, the saddle would have to be ordered also. The saddles are not included when purchasing the replacement cylinders.