2x Interlocking 3-in-1 Cast Iron Rear Blocks, 4x OEM Grade U-Bolts, 8x OEM Grade Nuts and Washers, Patented design has 9 interlocking points of contact, Black E-Coated for a durable, lasting finish, Installation Time: 1.1 hours, Completes a FULL 4-CORNER LIFT if you?ve already installed an adjustable ProRYDE front Lift/Leveling kit. Puts the rake back in your leveled truck for towing and hauling. Black e-coated for a durable, lasting finish. Installation Time: 1.1 hours. Lifetime Warranty