Replaces Arm Bracket Roller Cam Kit: Replaces Brake Arm Assembly: 532184907, 184907 And 131845; Replaces Idler Arm 532155046, 155046X421, 532176932, 155046, 531166601. Replaces Spring 131335, 532179748, 179748, 532131335. Kits Package Included: Kit included 1 X 532155046 Idler Arm, 2 X 532184907 Brake Arm Assembly, 4 X 532131335 Springs. Function: The idler arm allows the blades to disengage as they should. The brake arm applies pressure to the pulley, stopping the blades from as they disengage. A spring pulls the blade brake onto the mandrel pulley while disengaging the deck, stopping the blades from . Arm Bracket Roller Cam Kit for Models LT16542, LT18542, LT18542A, LT18542B, LTH1742C, LTH1742D, LTH18542A, LTH18542B, LTH18542C, LTH2042A, LTH2042B, LTH2042C, YTH1842A, YTH1842C. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color: As Shown Material: Metal Package Contents: 1 x Arm Bracket Roller Cam Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.