Unzip or tear apart the Velcro on the upholstery of the arm rest of the chair. Push the foam to the side and locate the bolt attaching the arm to the chair.
Determine the proper socket size for the bolt heads by placing sockets over the bolt head until you find the right size. Attach this socket to the ratchet and set the ratchet to turn counterclockwise.
Unscrew the retaining bolt to the chair arm. Remove the bolt and gently pull the arm off the chair.
Store the bolt in a location you will remember.