This heavy - duty truck hub seal installer kit is a must - have for truck maintenance. It comes with 9-piece, including 5 drivers and 2 extension handles. The size range of the drivers is from 4 - 13/16 in. to 6 - 5/16 in., making it suitable for multiple types of trucks, such as Class 7 and 8 over - the - road trucks, trailers, and some medium - duty trucks. The kit is designed for easy sealing ring installation. You can quickly remove and reinstall the sealing ring on bearings without causing damage to other components. The laser - engraved markings on the drivers allow for quick size identification, and the blow - molded plastic case keeps the tools well - organized. Made of aluminum alloy with an oxidized coating, it offers excellent durability and corrosion resistance, withstanding even the harshest usage. With this kit, you can install the seal without removing the brake drums, saving you time and effort in truck maintenance.