The Never Fail Shackle, Bolt, and Bushing Kit comes complete with all the hardware you need to replace your standard running gear kit. Replace today and forget about bushing maintenance forever.• No lubrication required• Upgrade from standard bronze bushings• Less expensive alternative to wet bolts• Maintenance-free An upgrade from standard bronze bushings Maintenance-free | Lippert Never Fail Shackle and Bolt Suspension Hardware Kit, Tandem Axle