This arm is built to professional standards and is typically replaced if it becomes bent or if the pivot point wears down from heavy commercial use. Primary Function: Provides the structural frame for the right rear wheel and facilitates height-of-cut adjustments. Fits Models: * HRC216K2 (HXA and PDA versions). HRC216K3 (HDA, HXA, PDA, and HDAH versions). HRC216YXB (EXA6 versions). Replaces Part Number: This part directly replaces the older 42930-VK6-000. Weight: Approximately 0.77 lbs, constructed from high-durability steel for professional longevity.