This emergency brake knob fits Mack and Navistar air brake systems and is pulled or pushed to mechanically engage or release the parking brake, holding the truck stationary when parked. The kit includes the knob itself along with a spiral retaining pin to secure it in place. It is sold as one each.Interchanges:Mack 745-240272Navistar 463008C1LVK-1368FeaturesEmergency brake knob for air brake systemsIncludes LPN-5119 spiral retaining pin (31AX629)Sold pack quantity: 1 eachTech SpecsSell pack: 1 eachKit includes: LVK-1368-001 emergency brake knob and LPN-5119 spiral pin