Dukal Replacement Black Adjustment Handles provide a direct-fit replacement component designed to restore the smooth, secure height and angle positioning of phlebotomy chair armrests. Manufactured from heavy-duty, impact-resistant molded plastic with threaded metal inserts, these ergonomic adjustment knobs allow clinicians to easily tighten or loosen the flip-up arm assembly with precision. Designed specifically for Dukal and Tech-Med® blood draw chairs, this two-count pack replaces worn, lost, or stripped handles to ensure continuous operational safety and chair adjustment control in busy clinical draw stations.