Hustler OEM 601972 Wire Harness/Safety Switch Assembly is used exclusively on Hustler Trimstar Models. The Hustler OEM 601972 Safety Switch Wire Harness Combo is Made to Bridge the Distance of the T Bar Handle Assembly and Wrapped in Wire Coating to help Prevent Any wear and break point in a Prone-To-Be High Wear Erea. the Safety Switch Side of the Assembly is used to communicate to other Electrical Components (Brake Safety, Ignition Switch, PTO Switch, Ect.) when an operator is present and ready for Operation. The Operator in return will Need to hold in one of the two handlebar Assembly T Bar Arm lever to communicate when they are present and ready for Operation. this in return will activate the T Bar 601972 Operator Safety Switch and allow it to Communicate to the rest of the Unit. Please refer to the Images above; Product Specifications, Special Notes and the Model Fit guide below to ensure proper fit. HYDRAULIC DRIVE BELT ASSOCIATED PART NUMBER REFERENCE CLICK ON THE ASSOCIATED PART NUMBER TO BE REDIRECTED 341826 - Operator Safety Lever/Arm - T Bar Handle Assembly 342378 - Safety Switch Spacer 077842 - Safety Switch Fastners/Bolts 779165 - Safety Switch/Spacer Plate Location Pins 039693 - Nut Plate Specification Product Number: 601972 Brand: Hustler Length: 7.25 IN Width: 3.40 IN Height: 0.85 IN Weight: 0.085 LB. Model Fit: 929240, 929265, 929273, 929232, 930388, 930388US, 930396, 930404, 930412, 939496, 939504, 939512, 939538, 942268, 942276