Caster Chair Company Chromcraft Swivel Tilt Mechanism (only fits Chromcraft)

I have two 15 years old Chromcraft chairs which were leaning and wobbling badly. The fabric and frames are still in great condition and I hated the thought of losing them. And I really wasn’t thrilled with the cost of new ones! I was uncertain about these mechanisms at first. But I read many of the reviews which reassured me. I am not mechanically inclined but have a friend who is. It would have helped if the mechanisms had arrived with instructions, but there were none. However, we figured it out and were able to have both chairs fixed in under an hour. The mechanisms work as described! I have my chairs working like new again.